diff --git a/lexers/o/openscad.go b/lexers/o/openscad.go
new file mode 100644
index 0000000..1215d7a
--- /dev/null
+++ b/lexers/o/openscad.go
@@ -0,0 +1,43 @@
+package o
+
+import (
+	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
+)
+
+var OpenSCAD = internal.Register(MustNewLexer(
+	&Config{
+		Name:      "OpenSCAD",
+		Aliases:   []string{"openscad"},
+		Filenames: []string{"*.scad"},
+		MimeTypes: []string{"text/x-scad"},
+	},
+	Rules{
+		"root": {
+			{`[^\S\n]+`, Text, nil},
+			{`\n`, Text, nil},
+			{`//(\n|[\w\W]*?[^\\]\n)`, CommentSingle, nil},
+			{`/(\\\n)?[*][\w\W]*?[*](\\\n)?/`, CommentMultiline, nil},
+			{`/(\\\n)?[*][\w\W]*`, CommentMultiline, nil},
+			{`[{}\[\]\(\),;:]`, Punctuation, nil},
+			{`[*!#%\-+=?/]`, Operator, nil},
+			{`<|<=|==|!=|>=|>|&&|\|\|`, Operator, nil},
+			{`\$(f[asn]|t|vp[rtd]|children)`, NameVariableMagic, nil},
+			{Words(``, `\b`, `PI`, `undef`), KeywordConstant, nil},
+			{`(use|include)((?:\s|\\\\s)+)`, ByGroups(KeywordNamespace, Text), Push("includes")},
+			{`(module)(\s*)([^\s\(]+)`, ByGroups(KeywordNamespace, Text, NameNamespace), nil},
+			{`(function)(\s*)([^\s\(]+)`, ByGroups(KeywordDeclaration, Text, NameFunction), nil},
+			{`\b(true|false)\b`, Literal, nil},
+			{`\b(function|module|include|use|for|intersection_for|if|else|return)\b`, Keyword, nil},
+			{`\b(circle|square|polygon|text|sphere|cube|cylinder|polyhedron|translate|rotate|scale|resize|mirror|multmatrix|color|offset|hull|minkowski|union|difference|intersection|abs|sign|sin|cos|tan|acos|asin|atan|atan2|floor|round|ceil|ln|log|pow|sqrt|exp|rands|min|max|concat|lookup|str|chr|search|version|version_num|norm|cross|parent_module|echo|import|import_dxf|dxf_linear_extrude|linear_extrude|rotate_extrude|surface|projection|render|dxf_cross|dxf_dim|let|assign|len)\b`, NameBuiltin, nil},
+			{`\bchildren\b`, NameBuiltinPseudo, nil},
+			{`"(\\\\|\\"|[^"])*"`, LiteralStringDouble, nil},
+			{`-?\d+(\.\d+)?(e[+-]?\d+)?`, Number, nil},
+			{`[a-zA-Z_]\w*`, Name, nil},
+		},
+		"includes": {
+			{"(<)([^>]*)(>)", ByGroups(Punctuation, CommentPreprocFile, Punctuation), nil},
+			Default(Pop(1)),
+		},
+	},
+))
diff --git a/lexers/testdata/openscad.actual b/lexers/testdata/openscad.actual
new file mode 100644
index 0000000..7dc6e2a
--- /dev/null
+++ b/lexers/testdata/openscad.actual
@@ -0,0 +1,46 @@
+use <write.scad>
+include <../common/base.scad>
+
+/*
+	Multiline
+	Comment
+*/
+
+//draw a foobar
+module foobar(){
+    translate([0,-10,0])
+    difference(){
+    	height=5+6;
+        cube([height,10.04,2.99e+8]);
+        sphere(r=PI,$fn=100);
+    }
+}
+
+foobar();
+#cube ([5,5,5]);
+echo("done");
+    
+function func0() = 5;
+function func1(x=3) = 2*x+1;
+function func2() = [1,2,3,4];
+function func3(y=7) = (y==7) ? 5 : 2 ;
+function func4(p0,p1,p2,p3) = [p0,p1,p2,p3];
+    
+echo (func0());           // 5
+a =   func1();            // 7
+b=    func1(5);           // 11
+echo (func2());           // [1, 2, 3, 4]
+echo( func3(2),func3());  // 2, 5
+   
+z= func4(func0(),func1(),func2(),func3()); //  [5, 7, [1, 2, 3, 4], 5]
+   
+translate([0,-4*func0(),0])cube([func0(),2*func0(),func0()]);
+
+module parallelogram(x=1,y=1,angle=90)
+    {polygon([[0,0],[x,0],
+              [x+x*cos(angle)/sin(angle),y],
+              [x*cos(angle)/sin(angle),y]]);};
+  
+parallelogram(10,10,35);
+
+ function add_up_to(n) = ( n==0 ? 0 : n + add_up_to(n-1) );
diff --git a/lexers/testdata/openscad.expected b/lexers/testdata/openscad.expected
new file mode 100644
index 0000000..eda2a12
--- /dev/null
+++ b/lexers/testdata/openscad.expected
@@ -0,0 +1,367 @@
+[
+  {"type":"KeywordNamespace","value":"use"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"\u003c"},
+  {"type":"CommentPreprocFile","value":"write.scad"},
+  {"type":"Punctuation","value":"\u003e"},
+  {"type":"Text","value":"\n"},
+  {"type":"KeywordNamespace","value":"include"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"\u003c"},
+  {"type":"CommentPreprocFile","value":"../common/base.scad"},
+  {"type":"Punctuation","value":"\u003e"},
+  {"type":"Text","value":"\n\n"},
+  {"type":"CommentMultiline","value":"/*\n\tMultiline\n\tComment\n*/"},
+  {"type":"Text","value":"\n\n"},
+  {"type":"CommentSingle","value":"//draw a foobar\n"},
+  {"type":"KeywordNamespace","value":"module"},
+  {"type":"Text","value":" "},
+  {"type":"NameNamespace","value":"foobar"},
+  {"type":"Punctuation","value":"(){"},
+  {"type":"Text","value":"\n    "},
+  {"type":"NameBuiltin","value":"translate"},
+  {"type":"Punctuation","value":"(["},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":","},
+  {"type":"Operator","value":"-"},
+  {"type":"LiteralNumber","value":"10"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":"])"},
+  {"type":"Text","value":"\n    "},
+  {"type":"NameBuiltin","value":"difference"},
+  {"type":"Punctuation","value":"(){"},
+  {"type":"Text","value":"\n    \t"},
+  {"type":"Name","value":"height"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Operator","value":"+"},
+  {"type":"LiteralNumber","value":"6"},
+  {"type":"Punctuation","value":";"},
+  {"type":"Text","value":"\n        "},
+  {"type":"NameBuiltin","value":"cube"},
+  {"type":"Punctuation","value":"(["},
+  {"type":"Name","value":"height"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"10.04"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"2.99e+8"},
+  {"type":"Punctuation","value":"]);"},
+  {"type":"Text","value":"\n        "},
+  {"type":"NameBuiltin","value":"sphere"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"r"},
+  {"type":"Operator","value":"="},
+  {"type":"KeywordConstant","value":"PI"},
+  {"type":"Punctuation","value":","},
+  {"type":"NameVariableMagic","value":"$fn"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"100"},
+  {"type":"Punctuation","value":");"},
+  {"type":"Text","value":"\n    "},
+  {"type":"Punctuation","value":"}"},
+  {"type":"Text","value":"\n"},
+  {"type":"Punctuation","value":"}"},
+  {"type":"Text","value":"\n\n"},
+  {"type":"Name","value":"foobar"},
+  {"type":"Punctuation","value":"();"},
+  {"type":"Text","value":"\n"},
+  {"type":"Operator","value":"#"},
+  {"type":"NameBuiltin","value":"cube"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"(["},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Punctuation","value":"]);"},
+  {"type":"Text","value":"\n"},
+  {"type":"NameBuiltin","value":"echo"},
+  {"type":"Punctuation","value":"("},
+  {"type":"LiteralStringDouble","value":"\"done\""},
+  {"type":"Punctuation","value":");"},
+  {"type":"Text","value":"\n    \n"},
+  {"type":"KeywordDeclaration","value":"function"},
+  {"type":"Text","value":" "},
+  {"type":"NameFunction","value":"func0"},
+  {"type":"Punctuation","value":"()"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Punctuation","value":";"},
+  {"type":"Text","value":"\n"},
+  {"type":"KeywordDeclaration","value":"function"},
+  {"type":"Text","value":" "},
+  {"type":"NameFunction","value":"func1"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"x"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"3"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"LiteralNumber","value":"2"},
+  {"type":"Operator","value":"*"},
+  {"type":"Name","value":"x"},
+  {"type":"Operator","value":"+"},
+  {"type":"LiteralNumber","value":"1"},
+  {"type":"Punctuation","value":";"},
+  {"type":"Text","value":"\n"},
+  {"type":"KeywordDeclaration","value":"function"},
+  {"type":"Text","value":" "},
+  {"type":"NameFunction","value":"func2"},
+  {"type":"Punctuation","value":"()"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"["},
+  {"type":"LiteralNumber","value":"1"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"2"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"3"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"4"},
+  {"type":"Punctuation","value":"];"},
+  {"type":"Text","value":"\n"},
+  {"type":"KeywordDeclaration","value":"function"},
+  {"type":"Text","value":" "},
+  {"type":"NameFunction","value":"func3"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"y"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"7"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"y"},
+  {"type":"Operator","value":"=="},
+  {"type":"LiteralNumber","value":"7"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"?"},
+  {"type":"Text","value":" "},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":":"},
+  {"type":"Text","value":" "},
+  {"type":"LiteralNumber","value":"2"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":";"},
+  {"type":"Text","value":"\n"},
+  {"type":"KeywordDeclaration","value":"function"},
+  {"type":"Text","value":" "},
+  {"type":"NameFunction","value":"func4"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"p0"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"p1"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"p2"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"p3"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"["},
+  {"type":"Name","value":"p0"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"p1"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"p2"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"p3"},
+  {"type":"Punctuation","value":"];"},
+  {"type":"Text","value":"\n    \n"},
+  {"type":"NameBuiltin","value":"echo"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"func0"},
+  {"type":"Punctuation","value":"());"},
+  {"type":"Text","value":"           "},
+  {"type":"CommentSingle","value":"// 5\n"},
+  {"type":"Name","value":"a"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":"   "},
+  {"type":"Name","value":"func1"},
+  {"type":"Punctuation","value":"();"},
+  {"type":"Text","value":"            "},
+  {"type":"CommentSingle","value":"// 7\n"},
+  {"type":"Name","value":"b"},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":"    "},
+  {"type":"Name","value":"func1"},
+  {"type":"Punctuation","value":"("},
+  {"type":"LiteralNumber","value":"5"},
+  {"type":"Punctuation","value":");"},
+  {"type":"Text","value":"           "},
+  {"type":"CommentSingle","value":"// 11\n"},
+  {"type":"NameBuiltin","value":"echo"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"func2"},
+  {"type":"Punctuation","value":"());"},
+  {"type":"Text","value":"           "},
+  {"type":"CommentSingle","value":"// [1, 2, 3, 4]\n"},
+  {"type":"NameBuiltin","value":"echo"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Text","value":" "},
+  {"type":"Name","value":"func3"},
+  {"type":"Punctuation","value":"("},
+  {"type":"LiteralNumber","value":"2"},
+  {"type":"Punctuation","value":"),"},
+  {"type":"Name","value":"func3"},
+  {"type":"Punctuation","value":"());"},
+  {"type":"Text","value":"  "},
+  {"type":"CommentSingle","value":"// 2, 5\n"},
+  {"type":"Text","value":"   \n"},
+  {"type":"Name","value":"z"},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Name","value":"func4"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"func0"},
+  {"type":"Punctuation","value":"(),"},
+  {"type":"Name","value":"func1"},
+  {"type":"Punctuation","value":"(),"},
+  {"type":"Name","value":"func2"},
+  {"type":"Punctuation","value":"(),"},
+  {"type":"Name","value":"func3"},
+  {"type":"Punctuation","value":"());"},
+  {"type":"Text","value":" "},
+  {"type":"CommentSingle","value":"//  [5, 7, [1, 2, 3, 4], 5]\n"},
+  {"type":"Text","value":"   \n"},
+  {"type":"NameBuiltin","value":"translate"},
+  {"type":"Punctuation","value":"(["},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":","},
+  {"type":"Operator","value":"-"},
+  {"type":"LiteralNumber","value":"4"},
+  {"type":"Operator","value":"*"},
+  {"type":"Name","value":"func0"},
+  {"type":"Punctuation","value":"(),"},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":"])"},
+  {"type":"NameBuiltin","value":"cube"},
+  {"type":"Punctuation","value":"(["},
+  {"type":"Name","value":"func0"},
+  {"type":"Punctuation","value":"(),"},
+  {"type":"LiteralNumber","value":"2"},
+  {"type":"Operator","value":"*"},
+  {"type":"Name","value":"func0"},
+  {"type":"Punctuation","value":"(),"},
+  {"type":"Name","value":"func0"},
+  {"type":"Punctuation","value":"()]);"},
+  {"type":"Text","value":"\n\n"},
+  {"type":"KeywordNamespace","value":"module"},
+  {"type":"Text","value":" "},
+  {"type":"NameNamespace","value":"parallelogram"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"x"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"1"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"y"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"1"},
+  {"type":"Punctuation","value":","},
+  {"type":"Name","value":"angle"},
+  {"type":"Operator","value":"="},
+  {"type":"LiteralNumber","value":"90"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":"\n    "},
+  {"type":"Punctuation","value":"{"},
+  {"type":"NameBuiltin","value":"polygon"},
+  {"type":"Punctuation","value":"([["},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":"],["},
+  {"type":"Name","value":"x"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Punctuation","value":"],"},
+  {"type":"Text","value":"\n              "},
+  {"type":"Punctuation","value":"["},
+  {"type":"Name","value":"x"},
+  {"type":"Operator","value":"+"},
+  {"type":"Name","value":"x"},
+  {"type":"Operator","value":"*"},
+  {"type":"NameBuiltin","value":"cos"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"angle"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Operator","value":"/"},
+  {"type":"NameBuiltin","value":"sin"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"angle"},
+  {"type":"Punctuation","value":"),"},
+  {"type":"Name","value":"y"},
+  {"type":"Punctuation","value":"],"},
+  {"type":"Text","value":"\n              "},
+  {"type":"Punctuation","value":"["},
+  {"type":"Name","value":"x"},
+  {"type":"Operator","value":"*"},
+  {"type":"NameBuiltin","value":"cos"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"angle"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Operator","value":"/"},
+  {"type":"NameBuiltin","value":"sin"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"angle"},
+  {"type":"Punctuation","value":"),"},
+  {"type":"Name","value":"y"},
+  {"type":"Punctuation","value":"]]);};"},
+  {"type":"Text","value":"\n  \n"},
+  {"type":"Name","value":"parallelogram"},
+  {"type":"Punctuation","value":"("},
+  {"type":"LiteralNumber","value":"10"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"10"},
+  {"type":"Punctuation","value":","},
+  {"type":"LiteralNumber","value":"35"},
+  {"type":"Punctuation","value":");"},
+  {"type":"Text","value":"\n\n "},
+  {"type":"KeywordDeclaration","value":"function"},
+  {"type":"Text","value":" "},
+  {"type":"NameFunction","value":"add_up_to"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"n"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":"("},
+  {"type":"Text","value":" "},
+  {"type":"Name","value":"n"},
+  {"type":"Operator","value":"=="},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"?"},
+  {"type":"Text","value":" "},
+  {"type":"LiteralNumber","value":"0"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":":"},
+  {"type":"Text","value":" "},
+  {"type":"Name","value":"n"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"+"},
+  {"type":"Text","value":" "},
+  {"type":"Name","value":"add_up_to"},
+  {"type":"Punctuation","value":"("},
+  {"type":"Name","value":"n"},
+  {"type":"Operator","value":"-"},
+  {"type":"LiteralNumber","value":"1"},
+  {"type":"Punctuation","value":")"},
+  {"type":"Text","value":" "},
+  {"type":"Punctuation","value":");"},
+  {"type":"Text","value":"\n"}
+]