How to Make a Working Creeper

To make  working creeper, You Need a block of choice, a Creeper head, TNT, a button, an armor set without the helmet, and an armor stand.  Put a tower of TNT then put a three  by three tower or the block of your choice   around it so you can't see the TNT. Then put the armor stand on top. Put the armor and head on the armor stand. Put the button on a wall. Push the button and leave.