A Wall of Bricks

The bricks come next: 5 rows of 8, built by main.gd when the game starts. A brick is a scene, brick.tscn, that you preload and instantiate.

A for loop runs once for each number. for row in 5: runs with row as 0 to 4. A loop inside a loop visits every column of every row:

for row in 5:
	for column in 8:
		var brick = BRICK.instantiate()
		brick.position = Vector2(68 + column * 72, 60 + row * 26)
		add_child(brick)

Columns are 72 pixels apart and rows 26. That leaves a small gap between the 64 by 20 bricks.

Set each brick's color before you add it, one per row: brick.color = COLORS[row].