how to update a matrix for every count

my matrix is A=[1 2 3 4]

in first count i have updated the values to A=[6 7 8 9]

in second count my value has not been updated to A=[10 11 12 13] instead its coming [6 7 8 9]. its taking the same initial value of A for every count but i want to increment the values taking the updated values. please help

[Walter Roberson]

Please show your current code