Enclose Trap of Closing

This is a trap spell. The 4 long items must be placed (touching) in a square or rectangular shape in order for the spell to work. The spell is triggered when a person steps inside the boundary or the items are placed around the person or object. The enclosed space is as tall as the thing that is trapped. There is no way to jump over the barrier. The length of the chosen materials will determine the effect size. A person must succeed on a Dexterity Saving Throw or else they will be trapped. A DC 20 (Strength) check can dispel the trap. The person trapped has 2 tries to escape. If they do not succeed on the third try, they will take 3d8 electrocuting damage. Each subsequent fail they will take 1d8 damage. The items can be enchanted for an unlimited amount of time beforehand. Placing them around a person requires 1 action.