Creeper /Zombie Trap

Step 1:

Find a nice flat area

Step 2:

Dig an outline ( it can be as big as you want it)

Step 3:

Dig 3 or 4 blocks down

Step 4:

Make a deeper hole

Step 5:

Make a short tunnel

Step 6:

Look this is how it should look

Step 7:

Wait until it gets dark

Step 8:

You have caught one

Step 9:

Tads thanks guys