I have a pointer that's holding 100 bytes of data.
i would like to add 5 to every 2nd byte.

example:

```
1 2 3 4 5 6

```

will become:

```
1 7 3 9 5 11

```

Now i know i can do a for loop, is there a quicker way? something like memset that will increase the value of every 2nd byte ?

thanks