very basic code editing!

sheet.ts

@@ -3,10 +3,15 @@ import { runCode, addToContext } from "./runcode.ts";
 
 export type SheetType = "code" | "spritesheet" | "map" | "sfx" | "patterns" | "fonts";
 
-const getSheet = (n: number) => {
+export const getSheet = (n: number) => {
 	return getCart()[n].value;
 }
 
+// deno-lint-ignore no-explicit-any
+export const setSheet = (n: number, type: SheetType, value: any) => {
+	return getCart()[n] = {sheet_type: type, value};
+}
+
 export const codeSheet = (sheet: number) => {
 	const code = getSheet(sheet);
 	return runCode(code);