function love.draw()
    local eyeX = 200
    local eyeY = 200

    local distanceX = love.mouse.getX() - eyeX
    local distanceY = love.mouse.getY() - eyeY
    local distance = math.sqrt(distanceX^2 + distanceY^2)
    local angle = math.atan2(distanceY, distanceX)

    love.graphics.setColor(1, 1, 1)
    love.graphics.circle('fill', eyeX, eyeY, 50)

    love.graphics.setColor(0, 0, .4)
    love.graphics.circle('fill', 200, 200, 15)

    love.graphics.setColor(1, 1, 1)
    love.graphics.print(table.concat({
        'distance x: '..distanceX,
        'distance y: '..distanceY,
        'distance: '..distance,
        'angle: '..angle,
    }, '\n'))
end