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[1] background gray 1 [2] background gray 1 [3][4] background rgb 1 0 0 [5] background rgb 1 0 0 [6][7] background gray 1 [8] background gray 1 1:color push rgb 1 0 0 [9] background gray 1 1:color push rgb 1 0 0 [10] background gray 1 [11] background gray 1 Maximal depth of color stack:2 Some corrections are necessary!