You probably saw this on YouTube
This is my first insuctables
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Step 1: Materials
1: Four Blocks Of TNT
2:One Bucket Of Water
3: Twenty Redstone
Step 2: On With the Work
Dig a + In the Ground
Then Dump Your Bucket Of Water in the center of +
Then Put your redstone around the + leaving one piece of redstone Missing In The Front.
Then Put Your Lever At The empty slot, Then in every corner of + Put your TNT
Then Your done