Added infinite loop block to end arduino program.

apps/arduino/arduino_toolbox.xml

@@ -144,6 +144,7 @@
     </block>
     <block type="time_millis"></block>
     <block type="time_micros"></block>
+    <block type="infinite_loop"></block>
   </category>
   <sep></sep>
   <category name="Motors">

apps/arduino_classic/arduino_toolbox.xml

@@ -136,6 +136,7 @@
     </block>
     <block type="time_millis"></block>
     <block type="time_micros"></block>
+    <block type="infinite_loop"></block>
   </category>
   <category name="Motors">
     <block type="servo_write">

blocks/arduino/time.js

@@ -100,3 +100,19 @@ Blockly.Blocks['time_micros'] = {
     return 'int';
   }
 };
+
+Blockly.Blocks['infinite_loop'] = {
+  /**
+   * Waits forever, end of program.
+   * @this Blockly.Block
+   */
+  init: function() {
+    this.setHelpUrl('');
+    this.setColour(Blockly.Blocks.Arduino.time.HUE);
+    this.appendDummyInput()
+        .appendField("wait forever (end program)");
+    this.setInputsInline(true);
+    this.setPreviousStatement(true);
+    this.setTooltip('Wait indefinitely, stopping the program.');
+  }
+};

generators/arduino/time.js

@@ -60,3 +60,13 @@ goog.require('Blockly.Arduino');
   var code = 'micros()';
   return [code, Blockly.Arduino.ORDER_ATOMIC];
 };
+
+/**
+ * Code generator for the wait forever (end of program) block
+ * Arduino code: loop { while(true); }
+ * @param {!Blockly.Block} block Block to generate the code from.
+ * @return {string} Completed code.
+ */
+ Blockly.Arduino['infinite_loop'] = function(block) {
+  return 'while(true);';
+};