<Tr> <Td> 💙 </Td> <Td> U + 1F499 BLUE HEART </Td> <Td> & #x1f499; </Td> </Tr> <Tr> <Td> 💚 </Td> <Td> U + 1F49A GREEN HEART </Td> <Td> & #x1f49a; </Td> </Tr> <Tr> <Td> 💛 </Td> <Td> U + 1F49B YELLOW HEART </Td> <Td> & #x1f49b; </Td> </Tr> <Tr> <Td> 💜 </Td> <Td> U + 1F49C PURPLE HEART </Td> <Td> & #x1f49c; </Td> </Tr>

Who came up with the shape of a heart