Magento 1.9 - how to create layout of custom controller in magento

1. First create a controller. Suppose controller name is "test". put this code here action name is "name".

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class namespace_modulename_TestController extends Mage_Core_Controller_Front_Action{ public function nameAction() {     $this->loadLayout();     $this->renderLayout();      } }

2. After controller creation set layout go to design->template->layou open the xml file put these code

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<modulename_controllername_actionname>   <reference name="root">        <action method="setTemplate"><template>page/1column.phtml</template></action>      </reference>        <reference name="content">        <block type="core/template" name="getallcustomer_test" template="getallcustomer/test.phtml">      </block></reference>  </modulename_controllername_actionname>

3. and last send request for controller "modulname/controller/actionname". print the all data of test.phtml file.