At the end of each period, you could arrange your workers/units on the map to say something like:
"Curraissers." Or:
"Go to War." Or:
"Culture!!!"
Says the guy who has made multiple threads that advocate for building very few Workers early in the game. I think that you might need to pick a shorter message!
Better idea. Press alt+s. Type whatever you want. Grats you broke the game.
You could also draw the letters of your message using signs on the map (the signs could also say the same message, if you wanted).
WAR◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘WAR◘◘ ◘◘◘◘◘◘◘WAR◘◘◘◘◘◘◘◘◘◘◘◘ ◘◘◘WARWARWAR◘◘◘◘◘◘◘◘WAR
◘◘WAR◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘WAR◘◘◘ ◘◘◘◘◘WAR◘WAR◘◘◘◘◘◘◘◘◘ ◘◘◘WAR◘◘◘◘◘◘WAR◘◘◘◘◘◘WAR
◘◘◘◘WAR◘◘◘◘WAR◘◘◘◘WAR◘◘◘◘◘ ◘◘◘◘WARWARWAR ◘◘◘◘◘◘◘ ◘◘◘WARWARWAR◘◘◘◘◘◘◘◘WAR
◘◘◘◘◘◘◘WAR◘WAR◘WAR◘◘◘◘◘◘◘◘ ◘◘◘WAR◘◘◘◘◘◘◘WAR◘◘◘◘◘ ◘◘◘WAR◘◘◘◘◘◘WAR◘◘◘◘◘◘◘◘◘◘
◘◘◘◘◘◘◘◘◘WAR◘◘◘WAR◘◘◘◘◘◘◘◘◘ ◘WAR◘◘◘◘◘◘◘◘◘◘WAR◘◘◘◘ ◘◘◘WAR◘◘◘◘◘◘◘WAR◘◘◘◘◘WAR