Crossing exercise

Hey,

just looking for some ideas to run a passing exercise that end with a cross into the box. I have 15 players, with 1 being a goalkeeper.

I have warm up idea, then went to run a crossing drill with progressions and then finish off with a game. Main thing is to keep all 15 players active or run a mirrored drill on the other half of the 1/4 size pitch.

Any ideas are welcome.