Brushstroke by Roy Lichtenstein
Brushstroke by Roy Lichtenstein in the Museo Nacional Centro de Arte Reina Sofía, Madrid, Spain.
http://www.museoreinasofia.es/en/collection/artwork/brushstroke
https://en.wikipedia.org/wiki/Roy_Lichtenstein
https://en.wikipedia.org/wiki/Museo_Nacional_Centro_de_Arte_Reina_Sof%C3%ADa