zap;
background white;
load sb2.pdb;
wireframe 30;
select all;
spacefill 20%;

select all;
colour [225,225,0];

connect (all) (all) delete;

select atomno<34, (atomno>=400 and atomno<450), (atomno>=700 and atomno<750), (atomno>=1000 and atomno<1050);  
color [180,180,180];
select none;

select (atomno>=34 and atomno<=48), (atomno>=500 and atomno<550), (atomno>=800 and atomno<850); 
color [0,0,225]; select none;


select (atomno>=300 and atomno<350), (atomno>=600 and atomno<650), (atomno>=900 and atomno<950);
color [0,0,80]; select none;




select (atomno<=48); connect 3 (selected)(selected) create; color bonds [225,225,80]; select none;
select (atomno>=700 and atomno<850); connect 3 (selected)(selected) create; color bonds [225,225,80]; select none;


select (atomno>=300 and atomno<450); connect 3 (selected)(selected) create; color bonds red; select none;
select (atomno>=500 and atomno<650); connect 3 (selected)(selected) create; color bonds red; select none;
select (atomno>=900 and atomno<1050); connect 3 (selected)(selected) create; color bonds red; select none;