Empty code box on every parse call

starfish.js

@@ -82,6 +82,8 @@ class CodeBox {
      * Transforms the textual code box into usable matrix
      */
     ParseCodeBox() {
+        this.box = [];
+
         const cbRaw = this.codeBoxDOM.value;
         const rows = cbRaw.split("\n").filter((r) => r.length);