Nächtlich , by leo leuppi , 1948 , abstract , Concretism style , Line
A painting of a yellow circle surrounded by blue lines.
An abstract painting with a yellow circle in the center.  The yellow circle has white lines going through it.  There are blue lines on the left and right of the circle.  On the right side of the yellow circle is a brown square.  All of the lines are different shades of blue.  Some of the blue lines are black and some of the other shades of light blue.