How to set color gradients for specified multiple columns stroke by stroke?

[#1]

Thanks Experts!

dt=Open("$SAMPLE_DATA/Big Class.jmp");
ca="height1";w=Try(Length(as Column(Current Data Table(),ca)<<get name),0)>0;if(w<1,New Column(ca));Column(ca)<<Formula( height*1.1 );Current Data Table()<<run formulas;Column(ca)<<deleteFormula;

[#2]

Thank jthi !
 first