How to repeat a loop once it is finished

[abbasmo at centralfoundationboys.co.uk]

import time
#this is so that i can set a timer
print ("only print numbers as your answers (Round all numbers up) also the programme adds 0.5 extra for cost of :   ")
time.sleep(2)
#this is to let the person know what format to write it in#
answer = input ("enter the height of the room walls between 2 to 6 metres:   ")
#this is the first input to understand what the client wants#
print (answer)
#this is to let the client know what value they have put in to see if they have made a mistake#
while answer == range(2,6):
    Q1
#this lets the programme know which figures are acceptable#
Q1 = input("enter length of room walls between 1 to 25 metres:     ")
#this the second question that is chosen#
print (Q1)
#This is again to let the client know what number they have inserted in case they have made an error
while Q1 == range(1,25):
    Q2
#this is to let the programme know the numbers that are acceptable#
Q2 = input("choose the price of paint that you want. Luxury = 175 Standard cost 100 Economy = 45 ALL PRICES MULTIPLIED BY 100  :     ")
#this is the final question that is asked#
print (Q2)
#this the final indication of what the client has inserted into the equasion#



y = (int(answer) * int(Q1)* int(Q2))
#This tells the programme to multiply the numbers together#
print (y/100 + 0.5)
#this is because the programme only accepts whole numbers and to get the real value i needed to devide by 100
time.sleep(25)

what would be a small thing that I could add to make this thing run again?