>>1708605I'll admit I'm not sure what "ricing" is.
But I can give advice on extending an image like this.
Expanded paper size.
Selected narrow rectangle at top of image, duplicated on new layer, then stretched it straight upwards.
Used "skew" handles to slant bars to correct angle.. That left an empty triangle at upper left. Solid filled that.
Covered over skinny ellipses formed by colored dots on cut section. Cloned in a few new dots.