Cheat Engine

[Herobread]

This is current code:
[code][ENABLE]

00ABF837:
jmp 00F8039B
nop

00F8039B:
mov ecx, [ebp-34]
mov [ecx+30], 165
jmp 00ABF83D

[DISABLE]

00ABF837:
mov ecx, [ebp-34]
mov [ecx+30],eax[/code]

Basically I want to create like a fake ping that moves randomly at given times and don't stay the same. For example now it stays 165 as written here. I'd like to create like a timer so every 15 seconds it changes a number to something from 160-170 for example and it's completely random or in order for example 15 seconds and then 166, 15 seconds and then 167, 15 seconds 168, 15 seconds and then 169 and then 170, and then back etc... If someone sweet could help me make this great I'd greatly appreciate it