EUROSTART

#Natural phenomena #Quadrilaterals #Letters presenting a special form of writing #Luminous sources, rays, shafts of light #Other irregular parallelograms, trapezia and quadrilaterals, quadrilaterals containing one or more rounded corners #Two quadrilaterals, one inside the other #Quadrilaterals with dark surfaces or parts of surfaces #Letters in relief or shaded #Series of letters presenting different forms of writing #Letters in light-coloured characters on a dark background