[[:call [:ref "canvas"] [:static "document"] "getElementById" [[:val "canvas"]]] [:call [:ref "ctx"] [:ref "canvas"] "getContext" [[:val "2d"]]] [:set [:ref "ctx"] "fillStyle" [:val "red"]] [:call [:ref "_"] [:ref "ctx"] "fillRect" [[:val 0] [:val 0] [:val 600] [:val 100]]]]