Convert Long to binary - least signifant bit first

I have found an Arduino function which converts a 2-bytes-long-value to a binary value.

e.g. I call sendCommand(0x05) And it gives me an output:

00000101

void sendCommand(unsigned long command){ for (unsigned long mask = 1UL << (7); mask; mask >>= 1) { if (command & mask) { Serial.print( "1" ); } else { Serial.print( "0" ); } } } 

my Problem is, that I want to have the Least significant bit first. How do I have to adjust this function to achieve this?

e.g. sendCommand(0x05) shall give an output:

10100000