zap
load=1p47
define set1 *.O?' and nucleic
define set2 *.OP? and nucleic
define set3 *.N? and nucleic
set echo bottom right
background black
font echo 25

cartoons only
color structure
pause

restrict dna
wireframe only
color cpk
pause

select set1
cpk 200
echo "set1"
pause

cpk off
select set2
cpk 200
echo "set2"
pause

cpk off
select set3
cpk 200
echo "set3"
pause