How do i make a input action that is like a blinker

Hi,
I need help. I was wondering if there is a way to have a key make a hydro turn off and on? Like a blinker, but a longer duration?


i have a keybinding already, but it only does on or off. Its the code from my minivan.

Code:

{
"toggle_doorL":{"order":  2,  "onUp":"electrics.values.doorL = 1-(electrics.values.doorL or 0)", "title": "Left  door", "desc": "Opens/closes the left door" },
"toggle_doorR":{"order":  3,  "onUp":"electrics.values.doorR = 1-(electrics.values.doorR or 0)", "title": "Right door", "desc": "Opens/closes the left door" },
}