how to use for loop and while loop in this equation?

hi to all,

i hope you all will be fine and doing well,

(1) i have four initial values x=0, x=0.3, x=0.07 and x=0.001 i want find the values of p such that when x reaches to 1 or greather than 1.

(2) when x reaches to 1 it sholud strat again and take second intial value which is given above the programme and it should continoue till last intial value.

thanks

where x is initail value

n=8;
v=4
t=0.5
for i=1:n-1
    x=0
    while x<=1
        itn=itn+1
        p(1:n,i)=2*x+4*v
        x=x+t
    end
end