Hello all,
can someone help me build this program, cause i don't know how to make it right

Contain a program to increase the content of a counter by one if the test number modulo 16 is 4 remainder.Subroutine to be called for elements of an array of 15 single-byte numbers, by counting the numbers modulo 32 have residue 3.

i would be apriciate if someone help me