diff --git a/src/lib/Toolbox/Toolbox.xml b/src/lib/Toolbox/Toolbox.xml
index 65e2b44..3bbc3db 100644
--- a/src/lib/Toolbox/Toolbox.xml
+++ b/src/lib/Toolbox/Toolbox.xml
@@ -78,6 +78,13 @@
         <block type="blocks_get" />
         <block type="blocks_return" />
     </category>
+    <category name="Functions" colour="#5531D6">
+        <block type="functions_create" />
+        <block type="functions_return" />
+        <sep gap="48"></sep>
+        <block type="functions_call" />
+        <block type="functions_callreporter" />
+    </category>
     <category name="Debug" colour="#666666">
         <block type="debug_log" />
         <block type="debug_warn" />
diff --git a/src/resources/blocks/functions.js b/src/resources/blocks/functions.js
new file mode 100644
index 0000000..f4dbf94
--- /dev/null
+++ b/src/resources/blocks/functions.js
@@ -0,0 +1,95 @@
+import javascriptGenerator from '../javascriptGenerator';
+import registerBlock from '../register';
+
+const categoryPrefix = 'functions_';
+const categoryColor = '#5531D6';
+
+function register() {
+    // function
+    registerBlock(`${categoryPrefix}create`, {
+        message0: 'function %1 %2 %3',
+        args0: [
+            {
+                "type": "field_input",
+                "name": "ID",
+                "text": "id",
+                "spellcheck": false
+            },
+            {
+                "type": "input_dummy"
+            },
+            {
+                "type": "input_statement",
+                "name": "FUNC"
+            }
+        ],
+        nextStatement: null,
+        inputsInline: true,
+        colour: categoryColor,
+    }, (block) => {
+        const ID = block.getFieldValue('ID')
+        const FUNC = javascriptGenerator.statementToCode(block, 'FUNC');
+        
+        const code = `function ${ID}() { ${FUNC} }`;
+        return `${code}\n`;
+    })
+
+    // return
+    registerBlock(`${categoryPrefix}return`, {
+        message0: 'return %1',
+        args0: [
+            {
+                "type": "input_value",
+                "name": "VALUE",
+            }
+        ],
+        previousStatement: null,
+        inputsInline: true,
+        colour: categoryColor,
+    }, (block) => {
+        const VALUE = javascriptGenerator.valueToCode(block, 'VALUE', javascriptGenerator.ORDER_ATOMIC);
+        const code = `return ${VALUE || ''}`;
+        return `${code}\n`;
+    })
+
+    // call
+    registerBlock(`${categoryPrefix}call`, {
+        message0: 'call %1',
+        args0: [
+            {
+                "type": "field_input",
+                "name": "ID",
+                "text": "id",
+                "spellcheck": false
+            },
+        ],
+        previousStatement: null,
+        nextStatement: null,
+        inputsInline: true,
+        colour: categoryColor,
+    }, (block) => {
+        const ID = block.getFieldValue('ID')
+        const code = `${ID}()`;
+        return `${code}\n`;
+    })
+
+    // call
+    registerBlock(`${categoryPrefix}callreporter`, {
+        message0: 'call %1',
+        args0: [
+            {
+                "type": "field_input",
+                "name": "ID",
+                "text": "id",
+                "spellcheck": false
+            },
+        ],
+        output: null,
+        inputsInline: true,
+        colour: categoryColor,
+    }, (block) => {
+        const ID = block.getFieldValue('ID')
+        return [`${ID}()\n`, javascriptGenerator.ORDER_ATOMIC];
+    })
+}
+export default register;