Added nose and eye functions, final layout testing

The nose function got me stuck for a while, mostly because I tried to relearn how to measure
chord length of a circle so I could trig my way into an exact position of the turtle to make
the swoops for the septum/upper lip of the dog at the base of the nose, but after much math, I found
myself estimating anyway, so the only real known that I *needed* was the x-dir midpoint, which I knew
and from there I chose some reasonable numbers that make the bottom of the nose look as intended.

I'm finding myself not stuck, but challenged, with the final layout of all of the parts of the face. I think
I'm going to be in the same boat as before where exact values aren't really needed and I have enough info to
estimate a "close enough" position for how all of the parts come together. Order of operations is also
going to be important here because some of the shapes need to go on top of others to get a layering effect.

drawing.py

@@ -9,23 +9,78 @@ import superturtle as st
 
 # for the dog's ears
 def ear(rad):
-
+    pendown()
     # draw an ellipse, rad is the "radius" of the ellipse 
     for i in range(2):
         # two arcs, each one half of the ellipse
         circle(rad,90) # long side
         circle(rad//25,90) # short side
+    penup()
 
 # main part of the dog's face
-def face(rad):
-
+def face(rad,color):
+    pendown()
+    fillcolor(color)
+    begin_fill()
     # draw an ellipse, rad is the "radius" of the ellipse 
     for i in range(2):
         # two arcs, each one half of the ellipse
         circle(rad,90) # long side
         circle(rad//2,90) # short side
+    end_fill()
+    penup()
 
-face(100)
+def nose(rad):
+    # circles are drawn CCW so if the turtle is facing right, the nose is upside down
+    setheading(180)
+    pendown()
+    color = 'black'
+    fillcolor(color)
+    begin_fill()
 
+    # initial position will need to be shifted +X by rad/2 to be centered
+    for i in range(3):
+        forward(rad)
+        circle(rad,120)
+
+    end_fill()
+    penup()
+
+    # reset position and do the dogs septum/upper lip
+    forward(rad/2)
+    left(90)
+    forward(2*rad)
+    x = xcor()
+    y = ycor()
+    pendown()
+    # swoop right
+    forward(2*rad)
+    circle(rad,150)
+    penup()
+    goto(x,y)
+    setheading(270)
+    pendown()
+    # swoop left
+    forward(2*rad)
+    circle(-rad,150)
+    penup()
+
+def eye(rad):
+    pendown()
+    color = 'black'
+    fillcolor(color)
+    begin_fill()
+    circle(rad)
+    penup()
+
+pencolor('black')
+pensize(4)
+
+setheading(-135)
+face(200,'white')
+setheading(-45)
+face(200,'saddle brown')
+
+done()