Python 102.

Stddraw

import math
import stddraw

x0 = 0.0
y0 = 0.0
x1 = 1.0
y1 = 0.0
t = math.sqrt (3.0) / 2.0
stddraw.line (x0, y0, x1, y1)
stddraw.point(0.5, t/3.0)
stddraw.setXscale(x0, x1)
stddraw.setYscale(y0, y1)
stddraw.show()

# stddraw.setCanvasSize(w, h)
# stddraw.setXxcale (x0, x1)
# stddraw.setYsclae (y0, y1)
# stddraw.setPenRadius(r)

stddraw.setXscale (0,n)
stddraw.setYscale (0,n)
for i in range (n+1)
    stddraw.line (0, n-i, i, 0)
stddraw.show()

xd = [x-r, x, x+r, x]
yd = [y, y+r, y, y-r]
stddraw.polygon(xd, yd)

# stddraw.circle(x, y, r)
# stddraw.square(x, y, r)
# stddraw.rectangle (x, y, w, h)
# stddraw.polygon(x, y)
# stddraw.text (x,y,s)
# stddraw.setPenColor(color)
# stddraw.setFontFamily(font)
# stddraw.setFontSize(size)
# stddraw.clear(color)