damper

local damping = 1
while true do
    y_vel = ship.getVelocity()["y"]
    if y_vel > damping then
        redstone.setOutput("top", true)
        redstone.setOutput("bottom", false)
    elseif y_vel < damping * -1 then
        redstone.setOutput("top", false)
        redstone.setOutput("bottom", true)
    else
        redstone.setOutput("top", false)
        redstone.setOutput("bottom", false)
    end
    sleep()
end