Macros code to erase data

Grettings people

just need someone to help me with completing my macros code. I am trying to get a cell to display a code when i enter a number into another cell. I have most of the code but i am looking to add in another line that enables me to delete all data in the output cell when the input cell is blank.
here is what i have so far

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As i mentioned earlier, once the input cell is blank it should erase all data in the output cel.
Sorry guys, I know this seems easy but i am having a really bad mental block today.

appreciate the help
cheers

Try...

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