load=1TRO

define set1 *.O? and dna
define set2 *.OP? and dna
define set3 *.N? and dna


restrict dna
select all
cartoons off
wireframe 50
cpk 0
color green
pause

select set1
cpk 80
color red
pause

select set1
cpk 0
color green
select set2
cpk 80
color pink
pause

select set2
cpk 0
color green
select set3
cpk 80
color blue
pause