You will be adding the following code to a program to play Team Freeze Tag (enter after #Begin project code):

def bumper_pressed():
    global remote_control_code_enabled
    remote_control_code_enabled = False
    drivetrain.stop()
    brain.screen.set_fill_color(Color.RED)
    brain.screen.draw_rectangle(0, 0, 159, 107)
    wait(3, SECONDS)
    remote_control_code_enabled = True
    brain.screen.set_fill_color(Color.GREEN)
    brain.screen.draw_rectangle(0, 0, 159, 107)

brain.screen.set_fill_color(Color.GREEN)
brain.screen.draw_rectangle(0, 0, 159, 107)
bumper_a.pressed(bumper_pressed)

Line-by-line explanation of the code:

Code Line	Explanation
def bumper_pressed():	Defines a function called `bumper_pressed` with no parameters (nothing inside the parentheses `()`). All code lines that are indented after the colon (`:`) will only be run when the function is called (not before). We will call this function when the bumper switch on the robot is pressed. In order to use this function, we must define it before we call it.
global remote_control_code_enabled	Indicates that the variable named `remote_control_code_enabled` in this function refers to the variable already created in the Robot Configuration (hidden). This variable controls whether the controller works to move the robot or not.
remote_control_code_enabled = False	Disables the controller's ability to run code in the program. This is a Boolean variable that can be either `True` or `False`.
drivetrain.stop()	Stops the robot's `drivetrain` so the robot stops moving. This prevents the robot from being stuck moving in a direction when the bumper switch is pressed.
brain.screen.set_fill_color(Color.RED)	Sets the color for the fill of any shape drawn on the screen of the brain. The `brain` is an object and the `screen` is another object that is part of the screen (hence the dot notation). The `Color.RED` is a built-in constant value that represents the color red (shown when the bumper is pressed).
brain.screen.draw_rectangle(0, 0, 159, 107)	Draws a rectangle on the screen of the brain. It will use the current fill color (set in the previous line, so the order is important). The first two numbers are the x and y coordinates of the screen (`0, 0` is the upper-left corner point) and the second two are the width and height (in that order) of the rectangle. In this case, the rectangle will cover the entire available screen area.
wait(3, SECONDS)	Pauses execution of the code for the amount (`3`) of units (`SECONDS`). The next line of code will be executed after the time has passed.
remote_control_code_enabled = True	Enables the controller's ability to run code in the program. It is switched back to `True` from `False` that we changed it to earlier.
brain.screen.set_fill_color(Color.GREEN)	Sets the color for the fill of any shape drawn on the screen of the brain. The `Color.GREEN` is a built-in constant value that represents the color green (shown while the bumper is not pressed). You will change this to represent which team you are on in a match (blue or green).
brain.screen.draw_rectangle(0, 0, 159, 107)	Draws a rectangle on the screen of the brain. It will use the current fill color (again set in the previous line, so the order is important). Once again, this rectangle will cover the entire available screen area (and the previous rectangle).
brain.screen.set_fill_color(Color.GREEN)	Sets the color for the fill of any shape drawn on the screen of the brain. You will change the color here to represent which team you are on in a match (blue or green). Because this line is not indented, it will run no matter what. This will be the first line to run since the function will only run when it is called.
brain.screen.draw_rectangle(0, 0, 159, 107)	Draws a rectangle on the screen of the brain. Once again, this rectangle will cover the entire available screen area and will be the first rectangle drawn).
bumper_a.pressed(bumper_pressed)	Calls the function we created earlier (named `bumper_pressed`) when the bumper (named `bumper_a`) is pressed.