This instruction can simultaneously cause up to 8 outputs to start blinking.
oo is the starting output number, X is the mask of outputs to blink.
Only outputs whose corresponding bit in X is '1' will start blinking. Any output whose X bit is '0' will not blink, nor will it change state.
For example:
LoadX %01010001
BlinkM 5
This will cause outputs 5, 9 & 11 to start blinking.
See also Blink.