input: Write a python function to draw a simple bar chart using turtle graphics.
  assert draw_chart([100, 120, 95, 70, 60]) is None
  assert draw_chart([50, 75, 100, 125, 150]) is None
  assert draw_chart([200, 180, 160, 140, 120]) is None
output: import turtle
  
  def draw_chart(data):
      screen = turtle.Screen()
      screen.setworldcoordinates(0, 0, 50 * len(data), max(data) + 10)
      
      chart_turtle = turtle.Turtle()
      chart_turtle.speed(0)
      
      for index, value in enumerate(data):
          chart_turtle.penup()
          chart_turtle.goto(index * 50, 0)
          chart_turtle.pendown()
          chart_turtle.begin_fill()
          for _ in range(2):
              chart_turtle.forward(40)
              chart_turtle.left(90)
              chart_turtle.forward(value)
              chart_turtle.left(90)
          chart_turtle.end_fill()
      
      chart_turtle.hideturtle()
      screen.mainloop()