Blockly multiple and block

Blockly.Blocks['controls_logical_and'] = {
  init: function() {
    this.appendDummyInput().appendField('AND');
    this.appendValueInput('AND1').setCheck('Boolean');
    this.appendValueInput('AND2').setCheck('Boolean');
    this.setInputsInline(false);
    this.setOutput(true, "Boolean");
    this.setColour(30);
    this.setTooltip('Logical AND');
    this.setMutator(new Blockly.Mutator(['controls_condition_block']));
    this.numberOfChildren = 2;
  },
  mutationToDom: function()
  {
      if(!this.numberOfChildren)
      {
          return null;
      }
      var container = document.createElement('mutation');
      if(this.numberOfChildren)
      {
          container.setAttribute('children', this.numberOfChildren);
      }
      return container;
  },
  domToMutation: function(xmlElement)
  {
      this.numberOfChildren = parseInt(xmlElement.getAttribute('children'), 10) || 0;
      for(var i = 3; i <= this.numberOfChildren; i++)
      {
          this.appendValueInput('AND' + i)
              .setCheck('Boolean');
      }
  },
  decompose: function(workspace)
  {
      var containerBlock = Blockly.Block.obtain(workspace, 'controls_and_tooltip');
      containerBlock.initSvg();
      var connection = containerBlock.getInput('STACK').connection;
      for(var i = 1; i <= this.numberOfChildren; i++)
      {
          var conditionBlock = Blockly.Block.obtain(workspace, 'controls_condition_block');
          conditionBlock.initSvg();
          connection.connect(conditionBlock.previousConnection);
          connection = conditionBlock.nextConnection;
      }
      return containerBlock;
  },
  compose: function(containerBlock)
  {
      for(var i = this.numberOfChildren; i > 0; i--)
      {
          this.removeInput('AND' + i);
      }
      this.numberOfChildren = 0;
      var clauseBlock = containerBlock.getInputTargetBlock('STACK');
      while(clauseBlock)
      {
          this.numberOfChildren++;
          var andInput = this.appendValueInput('AND' + this.numberOfChildren)
                             .setCheck('Boolean');
                             //.appendField('condition' + this.numberOfChildren);
          if(clauseBlock.valueConnection_)
          {
              andInput.connection.connect(clauseBlock.valueConnection_);
          }
          clauseBlock = clauseBlock.nextConnection &&
          clauseBlock.nextConnection.targetBlock();
      }
  },
  saveConnections: function(containerBlock)
  {
      var clauseBlock = containerBlock.getInputTargetBlock('STACK');
      var i = 1;
      while(clauseBlock)
      {
          var andInput = this.getInput('AND' + i);
          clauseBlock.valueConnection_ = andInput && andInput.connection.targetConnection;
          i++;
          clauseBlock = clauseBlock.nextConnection &&
          clauseBlock.nextConnection.targetBlock();
      }
  }
}

Blockly.Blocks['controls_and_tooltip'] =
{
    init: function() {
    this.setColour(Blockly.Blocks.logic.HUE);
    this.appendDummyInput()
        .appendField('AND');
    this.appendStatementInput('STACK');
    this.setTooltip('multiple and control');
    this.contextMenu = false;
    }
}

Blockly.Blocks['controls_condition_block'] =
{
    init: function() {
    this.setColour(Blockly.Blocks.logic.HUE);
    this.appendDummyInput()
        .appendField('condition');
    this.setPreviousStatement(true);
    this.setNextStatement(true);
    this.setTooltip('conditionalStatement');
    this.contextMenu = false;
    }
};