sleep.xml

 <tool id="wait_tool" name="wait_tool" version="1">
  <description>wait_tool_to_test_zerg_mode </description>
  <macros>
  </macros>
  <requirements>
  </requirements>
  <command>
    <![CDATA[
          sleep $seconds && echo "I slept" >$output

        ]]>
  </command>
  <inputs>
    <param  name="seconds" label="input vcf " type="text" optional="false" />
  </inputs>
  <outputs>
    <data format="txt" name="output"  label="ZZZZZZZZZZZZZZZZZZZZ"/>
  </outputs>
  <help>
  </help>
  <citations>
  </citations>
</tool>