i want to display specific line to be color in alvlist how

i want to display specific line to be color in alvlist

i write the code as follows here document type is initial. then that line is to be

appeared as color line but problem is initially it is appeared correct later i moved to next previous screens error lines are to be colored where i have to clear

loop at it_doclist where blart eq space.

gt_layout-info_fieldname = 'COLOR_LINE'.

it_doclist-color_line = 'C600'.

modify it_doclist .

clear:it_doclist.

endloop.

please help me exactly

Thanks

Ramana reddy