player dies they do not re-spawn but they fall HELP???

I need a script that once the player dies they do not re-spawn but they fall on the ground and can only crawl and a yellow icon appears and gets more red as they lose their life. To be revived another payer has to go up to them and text has to appear ("hold X to revive") and they have to hold X (for a certain time and health goes to 100 again) to revive the person . If the person dies, It goes to a spectate gui spectating the the players in first person. If you are wondering, I tried to script this myself but it went very wrong. I am not a very experienced scripted just to say