Four-Square Court

 is an intermediate track in BTD6. The bloons will come in from the left side of the track, move along the crack in the sidewalk, then loop around each square once in a random order before exiting out of the same crack. Towers can be placed anywhere except on the mountains and sky. (Because the mountains are too far away)

Secret

 * If the player clicks on the four-square ball, they will get 10 green rubber. The ball will dissapear when clicked.

Trivia

 * The Rocky Mountains can be seen in the distance.