brake booster
 

i installd new dics and brakepad for some reason every time im going to stop my break pedal slowly moves down to the firewall i bleed the brakes still does the same but when the car is of the brake pedal get hard after a few pumps but when the car is on the break pedal loosens i pup the pedal but they go all the way down ? wat could be the problem

Your symptoms are a leaking Master Cylinder (MC). New MC is an easy job, but you need flare tubing (10mm) to turn the tubing nuts w/o damaging (open end may damage).

I suggest an OEM MC for this critical assy and to minimize potential for need to adjust brake booster/master cylinder pushrod gap. You don't want to get into that adjustment.

good luck

i have the car of i push the pedal the pedal slowly move down when the car is off

Pedal sinking in symptomatic of a faulty master cylinder as TexasHonda said. It could also be leaking lines, I hope for your sake that it is the master cylinder.

p.s.- Please work on your spelling and grammar, it is difficult to make out your questions.