If you want a trap where if your hero walks over a spot he falls in a hole, here it is!
Set the event to Through and Player Touch
Set Move Route: This event
Turn left
Wait 1 frame
Turn right
wait 1 frame
turn up
wait four frames
Wait for Move's Completion
Text: Uh-Oh
Change Actor Graphic: [Main Character], , 0, , 0,
Change Screen Color Tone: (-255, -255, -255), @20
Set Move Route: This Event
Turn Down
Deal Damage: Entire Party, (number)
Change Actor Graphic: [Main Character],Main Character , 0, Main Character , 0,
Transfer Player: (put them on like the entry of room/dungeon or the floor below)
Change Screen Color Tone: (0, 0, 0) @20