help with a lisp command

Hi. I am using in a lisp code a layer with the name "test" .I wan't in the same layer to add splines but i want this created splines to have different colors in the same layer.

I use this command to create layers

(COMMAND "_layer" "_m" "Test" "_c" "150" "" "")

Some splines will be yellow or red.

Any idea?

Thanks

I fix it . i use this

Code:
(defun Layer (Nme Col Ltyp LWgt Plt)
 (entmake (list (cons 0 "LAYER")
                (cons 100 "AcDbSymbolTableRecord")
                (cons 100 "AcDbLayerTableRecord")
                (cons 2  Nme)
                (cons 70 0)
                (cons 62 Col)
                (cons 6 Ltyp)
                (cons 290 Plt)
                (cons 370 LWgt))))

Thanks