cmd.fragment ("arg")
for x in range(2, 101):
	cmd.edit("resi "+ str(x)+" and name C")
	editor.attach_amino_acid("pk1","arg")
	cmd.edit("resi "+str(x)+" and name N", "resi "+str(x)+" and name CA")
	cmd.torsion(65)
	cmd.edit("resi "+str(x)+" and name C", "resi "+str(x)+" and name CA") 
	cmd.torsion (-178)

cmd.zoom ("all")
cmd.center ("all")