Added comment, made custom code block inputs not required

src/blocks/custom.js

@@ -6,31 +6,31 @@ module.exports =  {
     inp1: {
       name: "1",
       type: "text",
-      required: true,
+      required: false,
       inline: false
     },
     inp2: {
       name: "2",
       type: "text",
-      required: true,
+      required: false,
       inline: false
     },
     inp3: {
       name: "3",
       type: "text",
-      required: true,
+      required: false,
       inline: false
     },
     inp4: {
       name: "4",
       type: "text",
-      required: true,
+      required: false,
       inline: false
     },
     inp5: {
       name: "5",
       type: "text",
-      required: true,
+      required: false,
       inline: false
     }
   },
@@ -40,7 +40,7 @@ module.exports =  {
     return customFunc(inputs.inp1, inputs.inp2, inputs.inp3, inputs.inp4, inputs.inp5);
   },
   pageBlock: {
-    html: "To access inputs, use vars inp1, inp2, etc<br><textarea name='code'></textarea>",
+    html: "To access inputs, use vars inp1, inp2, etc. Use return to output.<br><textarea name='code'></textarea>",
     js: function(block){
       if(block.properties.code){
         block.elem.find("textarea").val(block.properties.code);

src/outputCalculation.js

@@ -39,7 +39,7 @@ function resolveOutput(block, cache){
   }
 }
 
-function calculateOutputBlocks(){
+function calculateOutputBlocks(){ //resolve the output for frequency and output blocks, their execute functions will handle displaying
   var cache = {};
   var outputBlocks = diagram.state.filter((block)=>((block.type == "output") || (block.type == "frequency")));
   for(var block of outputBlocks){