Large flashing circles, seem to indicate taking of important strategic locations
Solid diamonds are tanks
Hollow diamonds maybe show direction, but if so what are the arrowheads!
Dots ?
Eye-? visibility?
Moving Telephone poles?
Tanks listening to music in different colors? Heavy metal, easy listening, classical just guesses!
Colour significance: Red is bad, orange is not nice and green is good applies to most things but he red tank colour doesnt mean bad.

The images below are from the manual Tank Warfare: Tunisia 1943 Graviteam Tactics: Mius-Front

One may assume they have similar significance.