update v21.5

The "Metropolis" update series will include tons of new buildings and elements for your city,  with the goal to supply a complete and realistic city tileset  

Modern Office but it's exteriors  
- Added 2 recolors to the whole modular tileset
- Added a loopable animation to each door of the Office theme

here are the 4 colour options:

See you and happy game-making! :)