local Down_up1 = createMarker(0, -3450, -0.55000, 'checkpoint', 40.0, 255, 0, 0, 150)
local Up_Down1 = createMarker(0, 3450, -0.55000, 'checkpoint', 40.0, 255, 0, 0, 150)
function Up (source )
local x, y, z = getElementPosition(source)
setElementPosition ( source, 0, 3400, z)
end
function Down (source )
local x, y, z = getElementPosition(source)
setElementPosition ( source, 0, -3400, z)
end
addEventHandler( "onMarkerHit", Down_up1, Up )
addEventHandler( "onMarkerHit", Up_Down1, Down )
Prueba así.