text: Blockly.Blocks['ana_infrared_sensor'] = {
    init: function() {
      this.appendDummyInput()
          .appendField("きょりが")
          .appendField(new Blockly.FieldDropdown([["近い", "near"], ["中くらい", "middle"], ["遠い", "far"]]), "distance");
      this.setOutput(true, "Number");
      this.setColour(315);
      this.setTooltip('');
      this.setHelpUrl('http://www.example.com/');
    }
  };
  