#-------------------------------------------------------------------------------
#  TurtleFunction1.py
#-------------------------------------------------------------------------------
import turtle

def draw_square(t, s):
   """Make turtle t draw a square of side length s."""
   
   for i in range(4):
      t.forward(s)
      t.left(90)
   # end of function draw_square()
# end draw_square()


#-- main program --------------------------------------------------------------
wn = turtle.Screen()        # Set up the window and its attributes
wn.bgcolor("lightgreen")
wn.title("Alex and Tess meet functions")

alex = turtle.Turtle()      # Create alex
tess = turtle.Turtle()      # Create tess
tess.pencolor("red")
tess.pensize(10)

draw_square(alex, 50)       # Call the function to draw the square
tess.right(45)
draw_square(tess, 150)
draw_square(alex, 175)

wn.mainloop()