Here Celtics, This is How You Beat The Trap

From Coaches Clipboard (to tell you the truth I didn't read it all I just googled how to beat the trap)

If it is a 1-1-2-1 Half Court Trap...
When attacking a this half court trap, make sure two of your players get down the floor into your forecourt before the ball the point guard arrives, and they should get deep up the sidelines, beyond the deep defender. With this trap alignment, the opponent is trying to get your point guard to commit first, either to the right or left. One option would be for the point guard to delay before crossing the half court line and make the long over-the-top pass to either corner. Another option would be to have the two remaining players (O2 and O3) positioned even with and on both sides of O1 as he/she crosses the line. The point can make the quick pass to either side, and then the pass goes quickly from that side straight up the sideline to the player deep in that corner. Once the ball gets into the corner areas, have your wings cut thru looking for the pass back and lay-up. Now, one other thing... if the initial pass from the point goes to one side, then have the opposite side player (not the opposite corner player) cut to the middle looking for a pass there in case the middle defender cheats to the ballside.

There might even be an occasion when the player with the ball on the side may have to make the deep, skip pass to the opposite corner, which should always be open... just make sure you've got someone who can accurately make that pass, and with some zip on the pass... no floaters please!

You can also screen the deep zone defender... pin the defender so he/she can't move to either the sideline or down low.

Then cut your opposite deep corner player to the ballside for the pass and layup. This screen and cut must be done quickly... before O2 gets trapped. The cutter should be in position almost as O2 gets the ball.
Half-court press breaker, vs 1-1-2-1

If it is a 1-2-1-1 Half Court Trap...
See the diagrams below. When attacking this half court trap, make sure three of your players get down the floor into your forecourt before the ball the point guard arrives.

O3 and O4 get deep up the sidelines. Have O5 get in the middle of the zone on the same side as the guard who does not have the ball (the intended receiver of the first pass O2). He/she can screen and get ballside position on the middle defender (see diagram). You can also screen and pin the deep zone defender so he/she can't move to either the sideline or down low. Then cut your opposite deep corner player to the ballside for the pass and layup. This screen and cut must be done quickly... before O2 gets trapped. The cutter should be in position almost as O2 gets the ball, so the pass can be made quickly before the trap arrives (see the diagrams below).
Half-court press breaker, vs 1-2-1-1