My iphone keeps rebooting itself every second?

So i have a jailbroken iphone and i installed something and instead of it usually saying "respring dashboard" it said "reboot device" so i clicked it and now it just literally keeps restarting itself and won't stay on. Help. :

Added (1). It won't let me turn it off it just keeps going to the little loading circle thing

I'm afraid to say but you have to reset your phone to make it work
1. Switch off your iPhone
2. Hold the home button and boot your phone
3. ITune icon will appear
4. Connect your phone to your pc and your pc will detect it
5. Reset your phone and enjoy

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