def setup(): 
    # Create a file in the sketch directory
    global output
    output = createWriter("positions.txt")
def draw(): 
    point(mouseX, mouseY)
    output.print(mouseX + "\t")# Write the X coordinate to the file
    output.print(mouseY)# Write the Y coordinate to the file
def keyPressed(): 
    output.flush()# Writes the remaining data to the file
    output.close()# Finishes the file
    exit()# Stops the program