zap
load 1hdd.pdb
define myDNA :A or :B
define set1 myDNA and *.O?'
define set2 myDNA and *.OP?
define set3 myDNA and *.N?

select all
wireframe 30
spacefill 70
pause
restrict myDNA
wireframe 30
spacefill 0
pause
select set1
spacefill 90
pause
restrict none
select myDNA
wireframe 30
select set2
spacefill 90
pause
restrict none
select myDNA
wireframe 30
select set3
spacefill 90
pause