Something like this perhaps ...
tlaRan
A1: Variable Randomize [ Name:%RanX Min:10 Max:20 ]
A2: Variable Randomize [ Name:%RanY Min:10 Max:20 ]
A3: Popup [ Title: Text:X,Y = %RanX,%RanY Background Image: Layout

opup Timeout (Seconds):1 Show Over Keyguard:On ]
... Thom