Drawing shapes
Rectangle
You can declare some variables to use for your rectangle, they require the x coordinate, the y coordinate, the width and the height:
LEFT = 100
TOP = 100
LENGTH = 20
WIDTH = 20
RECTCOORD = [LEFT, TOP, LENGTH, WIDTH]
rect1 = pygame.Rect(RECTCOORD)
This is the same as writing:
rect1 = pygame.Rect([100,100,20,20])
Before we can draw your rectangle to the screen we will need to define a colour to use:
RED = 255
YELLOW = 230
BLUE = 200
COLOR = (RED, YELLOW, BLUE)
Again this is the same as writing just:
COLOR = (255, 230, 200)