Basically goes like this:
Person 1: Simon Says... (insert command here)
Person 2: (does what the above person says and tells about it)
Simon Says... (insert command here)
Person 3: (Same as above)
and it keeps on going.
Try to be realistic, not some "simon says die" or something like that.
No one above me but I'll start us off;
Simon Says... shout out "BLOGLAND" irl