restrict none 
select dna, *:b
backbone 50
select dna
wireframe 50
echo press enter
pause
define set1 *.o5*                                                                                                                                                                   
echo set1           
echo press enter                   
pause                                               
define set2 (*.o1p,*.o2p) and dna                                                                                                       
echo set2      
echo press enter                   
pause
define phosphor *.p and dna
echo phoshor
pause
define carb2 ( *.c5*,*.c4*,*.c3*,*.c2*,*.c1*) and dna
echo carb2
pause
define nsmall ( *.n2,*.n3) and dna
echo nsmall
pause
define nbig (*.n6,*.n7,*.o4) and dna
echo nbig
pause
define csmall (*.c2,*.c4) and dna
echo csmall
pause
define cbig (*.c5,*.c5m,*.c4,*.c6,*.c8) and dna
echo cbig
select *:b and within(3.5, set1)
pause
select *:b and within(3.5, set2)
pause
select *:b and within(4.5, phosphor)
pause
select *:b and within(3.5, nsmall)
pause
select *:b and within(3.5, nbig)
pause
select *:b and within(4.5, carb2)
pause
select *:b and within(4.5, csmall)
pause
select *:b and within(4.5, cbig)
pause