What are Flavius and Marullus doing?

The tribunes Marullus and Flavius are angry with the plebeians because they are cheering for Caesar. They do not think tha Caeser represents Rome and wish to put the brakes on his building power. They find the plebians fickle and weak noting that they used to celebrate Pmpey, a Pompey that Caeser killed. Flavius and Marullus take down banners and seek to drive the crowds of supporters away.