//------------------------------------------------------------
// eyes.toby : draw some eyes on the screen.
//
//   Copyright (c) Lighting and Sound Technologies, 1998.
//    Written by Ryan C. Gordon.
//------------------------------------------------------------

// Global variables...
//number eyeballStep


function eyeballs(number skip) returns nothing
    number i
    boolean isDrawTime

    isDrawTime = false

    setPenColor(4)
    for i = 1 to 720
        if (isDrawTime)
            setPenDown()
            isDrawTime = false
        else
            setPenUp()
            isDrawTime = true
        endif
        goForward(skip)

        if (i >= 360)
            turnRight(1)
        else
            turnLeft(1)
        endif
    endfor
endfunction


function pupil(number x, number y) returns nothing
    number color = 0
    number i
	number direction = 1

	setTurtleXY(x, y)

    for i = 1 to 360
        setPenColor(color)
        setPenDown()
        goForward(30)
        setPenUp()
        goBackward(30)
        turnRight(1)
        color = color + direction
        if (color >= 15)
            direction = -1
		elseif (color <= 0)
			direction = 1
        endif
    endfor
endfunction


function main() returns nothing
    number centerX
    number centerY

	centerX = getTurtleX()
	centerY = getTurtleY()

	eyeballs(2)

//    center = calculateRadius(eyeballStep)


	pupil(centerX - 115, centerY)
	pupil(centerX + 115, centerY)

		// use the turtle as a "nose."  :)
	setTurtleXY(centerX, centerY + 50)
	setAngle(90)

endfunction

// end of eyes.toby ...