# shapes.py
# ---------
# By MWC contributors

import turtle
import math

# Set up the turtle
t = turtle.Turtle()
t.speed(3)
t.hideturtle()

# Draw triangle with lines (left side, unfilled)
t.penup()
t.goto(-200, 0)
t.pendown()
for _ in range(3):  # Unfilled triangle
    t.forward(200)
    t.left(120)

# Draw internal diagonal lines
t.penup()
t.goto(-200, 0)  # Bottom-left
t.pendown()
t.goto(-100, 100 * math.sqrt(3))  # Top

t.penup()
t.goto(-200, 0)  # Bottom-left
t.pendown()
t.goto(0, 100 * math.sqrt(3))  # Top-right

t.penup()
t.goto(0, 100 * math.sqrt(3))  # Top-right
t.pendown()
t.goto(-200, 0)  # Bottom-left

# Move to a separate position for upside-down rectangle grid (right side)
t.penup()
t.goto(100, 225)  # Start at the top for upside-down grid
t.pendown()

# Draw upside-down smaller grid rectangle with 9 units length, decreasing to 1
unit = 25  # Unit size is 25 pixels for a smaller rectangle
for i in range(9):  # 9 rows, starting from top and decreasing
    for j in range(9 - i):  # Decreases from 9 to 1
        t.penup()
        t.goto(100 + j * unit, 225 - i * unit)  # Invert y-coordinate for upside-down
        t.pendown()
        for _ in range(4):
            t.forward(unit)
            t.right(90)

# Keep window open
turtle.done()