Draw a glyph in drawbot extension

draw_glyph.py

f = CurrentFont()
glyphName = "a"
size = 1080
newPage (size,size)
black =  0,0,0
red =    1,0,0
green =  0,1,0
blue =   0,0,1
white =  1,1,1
pointshape = oval #oval or rect
onCurve = 8
onCurvePos = (onCurve/2)
offCurve = onCurve
offCurvePos = (onCurve/2)
glyphStroke = 1
fill(*blue)
rect(0,0,1080,1080)

# set the glyph stroke
strokeWidth(glyphStroke)
g = f[glyphName]

# position the glyph in the rect
translate((size-g.width)/2, 280)

# set the glyph's fill & stroke        
fill(0)
stroke(*white)
drawGlyph(g)
for c in g:
    for p in c.bPoints:
        # set the on-curve point fill
        fill(*white)
        # set the on-curve point stroke width
        strokeWidth(glyphStroke)
        # set the on-curve point stroke colour
        stroke(*white)
        (pointshape)(p.anchor[0]-(onCurvePos),p.anchor[1]-(onCurvePos),(onCurve),(onCurve))
        # set the off-curve line stroke width
        # put this before the off-curve points so the points draw over the top, otherwise this will draw over the top of the points
        strokeWidth(glyphStroke)
        # set the off-curve line stroke colour
        stroke(*white)
        line((p.anchor[0],p.anchor[1]),(p.anchor[0]+p.bcpIn[0],p.anchor[1]+p.bcpIn[1]))
        line((p.anchor[0],p.anchor[1]),(p.anchor[0]+p.bcpOut[0],p.anchor[1]+p.bcpOut[1]))    
        # set the off-curve point fill
        fill(*blue)
        # set the off-curve point stroke width
        strokeWidth(glyphStroke)
        # set the off-curve point stroke colour
        stroke(*white)
        # set the off-curve point shape, size and position
        # the anchor position should be 1/2 the size, so it centres correctly
        if (p.bcpIn[0], p.bcpIn[1]) != (0,0):
         (pointshape)(p.anchor[0]+p.bcpIn[0]-(offCurvePos),p.anchor[1]+p.bcpIn[1]-(offCurvePos),(offCurve),(offCurve))
        if (p.bcpOut[0], p.bcpOut[1]) != (0,0):
         (pointshape)(p.anchor[0]+p.bcpOut[0]-(offCurvePos),p.anchor[1]+p.bcpOut[1]-(offCurvePos),(offCurve),(offCurve))