Lighting up the sky...... help?

[monster]

I'm helping with the decorations for the Senior post-graduation all night lock-in party at the high school. I've found searchlight rental to "mark the spot" but it would be so cool if we could either project our logo into the sky batman-call style or laser-write it in the sky, but I'm having less luck finding anything like this. Sny tips on search terms to use etc would be appreciated,

thanks