zig-zag, criss-cross edgy lines pattern

angular apex black corrugated crease criss crisscross cross deform deformation deformity design distort distortion edge edgy element geometric geometrical geometry horizontal irregular jagged lineal linear lines monochrome parallel pattern peak pointy ridge serrated shape sharp shrill spike spiky spine strain streaks stress stripes strips taper tapering texture triangular vector white zag zig zigzag