please do # The following script is a demonstration of how to # rotate the molecule with a pause between frames # and superpose proteins. open pdb from "net" "1CRN"; open pdb from "net" "1BHP"; $SEL1 = select in "1crn" all; color res of $SEL1 by <1.0,0.0,0.0>; center on visible; # ----------- example of loop with rotate view and delay ---------- $X = 0; do { rotate <15.0,0.0,0.0>; pause 0.2; $X++; } while ($X < 20); # ----------- example of superposition ---------- superpose "1bhp" onto "1crn" using "CA"; redraw; center on visible; $RMSD = rms of "1bhp" and "1crn" using "CA"; $count = selcount of "1crn"; print "RMS is " + (string) $RMSD + " for " + (string) $count + " residues"; $X = 0; do { zoom 102.0; pause 0.2; $X++; } while ($X < 20); thank you