class Point(object): 
    """represents a point in 2-D space"""

class Rectangle(object): 
    """represent a rectangle. 
       attributes: width, height, corner (lower left), color.

       """
class Circle(object):
    """represents a circle.
       attributes: center, radius, color.
       """
class Polygon(object):
    """attributes: a list of points and a color"""

def draw_polygon(canvas, p):
    """Draws p on canvas."""
    canvas.polygon ([[pt.x, pt.y] for pt in p.points], fill= p.color)


def draw_rectangle(canvas, r):
    """Draws r on canvas."""
    bbox = [[r.corner.x, r.corner.y], [r.corner.x + r.width, r.corner.y + r.height]]
    canvas.rectangle(bbox, outline='black', width=2, fill=r.color)

def draw_circle(canvas, c):
    """draws c on canvas."""
    canvas.circle([c.center.x,c.center.y], c.radius, outline=None, fill=c.color)

from World import World

def flagOfBangladesh():
    w = World() 
    canvas = w.ca(width=500, height=500, background='white')
    rect = Rectangle()
    rect.color = 'green4'
    ll = Point()
    ll.x = -150
    ll.y = -100
    rect.corner = ll
    rect.height = 200
    rect.width = 300
    draw_rectangle(canvas, rect)
    c = Circle()
    c.radius = 70
    c.color = 'red'
    c.center = Point()
    c.center.x = -25
    c.center.y = 0
    draw_circle(canvas, c)
    w.mainloop()

def flagOfCzechRepublic():
    w = World() 
    canvas = w.ca(width=500, height=500, background='white')
    rect = Rectangle()
    rect.color = 'red'
    ll = Point()
    ll.x = -150
    ll.y = -100
    rect.corner = ll
    rect.height = 200
    rect.width = 300
    draw_rectangle(canvas, rect)
    rect.color = 'white'
    ll.y = 0
    rect.height = 100
    draw_rectangle(canvas, rect)
    triangle = Polygon()
    p1 = Point()
    p1.x = -150
    p1.y = -100
    p2 = Point()
    p2.x = -150
    p2.y = 100
    p3 = Point()
    p3.x = -85
    p3.y = 0
    triangle.points = [p1, p2, p3]
    triangle.color = 'blue'
    draw_polygon(canvas,triangle)
    w.mainloop()