My linocut portrait of Hedy Lamarr in indigo, with diagrams from her patent (Fig 4 like a piano roll) and a schematic of how a signal marked “Data”could be encoded with a pseudo-random binary sequence “PBRS” to produce a transmitted signal “Tx” - all in blue.
https://spore.social/system/media_attachments/files/113/453/155/352/026/606/original/0519c07b5c13da95.jpeg