signal lights blinking really fast, then it went away...how do i make it stay?

i was getting my new headlights and corner lights installed, and i decided to test them out half way during the installation, so i went to the car and hit the turn signal, and suddenly it was blinking super fast, like those modified ones. i was hoping it would stay like that, but when the headlight installation was complete, i checked again and it was gone...

what could it have been?

Probably because you didnt have one of your bulbs in.  This is used so you know when a bulb is out.
 
If you want that, switch your signal bulbs out for LED bulbs.  The draw and power consumption is so small your car thinks the bulb is burnt out and will blink fast to let you know.

so if i use LED bulbs, it can be for any of it, right?
like it can be the rear turn signals, rear brake lights, rear reverse light..
or does it have to be the signal?

LOL .... whatever ones blink man  ......  the resistance sets the blink rate.

just making sure