I type out the pattern that the light is going in. " bnnnbnnn", the b represents a long flash and the n represents a short...

Have you dropped your phone in the water recently? Can you list out any reasons why it wouldn't work(water, dropping it, sticking something into the speaker, whatever)? Try to retrace your steps, and we can find out how to fix it that way :D

Lots of phones have a system in place where there is a sensor that measures how close something is to it. When on a call, the light can go off if it thinks you have your phone to your ear. If you aren't doing this, then there is a chance that something is blocking the sensor, it might be the general darkness of the room, the phone case, or your hand. You just need to remove whatever is blocking it. Sometimes, if your phone is damaged, the sensor might just be malfunctioning. You can use this video that shows you a way to take it off! https://www.youtube.com/watch?v=5Jw5qsOb...

Do you know if it needs to be charged? Maybe plug it into a charger, wait for maybe five minutes, and then hold the on button down for around 60 seconds. If it turns on within those 60 seconds, you should let go. If it doesn't react to that, then it might be damaged from the inside, like water, or a broken battery.

Yes, the scratches could be triggering the motion touch sensors. You could probably find someone to repair it and it will go away, but make sure that its definitely the scratches doing it and not anything else

Do you have any other phones connected to it? You might be able to get its location by using an app or something if it is connected. There are tools from google like the "Find my Device" tool that you can use to find it. If it is still on, you can also call it's number and see if anyone answers/use the sound to look for it in your house.