Bounce

function love.load()
    orx = 200
    ory = 300

    orw = 100
    orh = 50

    timer = 0
    maxtimer = 3
end

function love.update(dt)
    dt = math.min(dt, 1/30)

    timer = timer + dt
    if timer >= maxtimer then
        timer = timer - maxtimer
    end
end

function love.draw()
    love.graphics.setLineWidth(1)
    love.graphics.setColor(0, 55, 0, 255)
    love.graphics.line(orx-orw, ory, orx+orw, ory)
    love.graphics.line(orx, ory, orx, ory-orh)

    love.graphics.setColor(0, 255, 0, 255)
    love.graphics.line(orx-3, ory, orx+3, ory)
    love.graphics.line(orx, ory-3, orx, ory+3)

    love.graphics.setColor(255, 0, 0, 255)

    local factor = 1.5 - timer/maxtimer
    love.graphics.circle("fill", orx + math.cos(math.pi*2*factor)*orw, ory - math.abs( math.sin(math.pi*2*factor) )*orh, 3, 16)
end