OK 51 let the sunshine in

#Numerals in light-coloured characters on a dark background #Series of letters presenting different forms of writing #Two quadrilaterals, one inside the other #Quadrilaterals containing other figurative elements #Letters in light-coloured characters on a dark background #Numerals presenting a special form of writing #Series of letters in different dimensions #Black #Quadrilaterals containing representations of heavenly bodies or natural phenomena #Sun with rays constituted by rectilinear lines, sheaves of lines or bands #Letters overlapping #Five colours and over #Red, pink, orange #White, grey, silver #Yellow, gold #Quadrilaterals containing one or more letters