In the 1921 paintings, many, though not all, of the black lines stop short at a seemingly arbitrary distance from the edge of the canvas although the divisions between the rectangular forms remain intact.
Pada lukisan-lukisan tahun 1921, banyak garis hitam (tapi tidak semua) berhenti secara tiba-tiba di posisi arbitrer dari tepi kanvas, meski pembagian di antara bidang-bidang persegi panjang tetap utuh.