[…] marchers — if you could call them that — pranced in grass skirts, leopard-skin warrior costumes and the multihued wings of butterflies.

Reptitious, ſtealing or creeping on by degrees.]

What are you pratting about with now? Get your homework done.

For the purpose, MuSCAT has a capability of self autoguiding which enables to fix positions of stellar images within ~1 pix.