load=1dfm
define set1 *.O?'
define set2 *.OP?
define set3 *.N? and dna

select all
cpk off
wireframe off
cartoon
pause

restrict dna
wireframe on
cartoon off
cpk off
pause

select set1
cpk 200
pause

cpk off
select set2
cpk 200
pause

cpk off
select set3
cpk 200
pause