All Quiet on the Martian Front

My Kickstarter arrived late last week.  Sadly, my Martians didn't get their Heat Ray template.  Puny humans!  As if this will stop their inevitable march to victory.  Co-conspirator Samuel Yates quickly replied to my emergency communique and promised they'd be in wave two.  He knows the Harvester will be calling if they are NOT!  In the meantime, he provided the following technical details

The sweep template is 6 inches
> long and 2 inches high. So if you drew a 6x2 rectangle and a curve from one
> corner to the other that touches the top. Then go in about an inch and a
> half from each corner and connect those two points with an arch you should
> be pretty close.

Tests with photoshop produced the following:

Copy-paste-print on orange, yellow, or red cardstock to suit!