And now you have your 10-bit Gray-code using consecutive addresses of 0000-to-1001 (0 to 9 in decimal). In this case, the sequence followed by this Gray code counter implementation is: 4, 6, 2, 0, 8, ...

Note that the correct grammar and spelling for Gray codes is “Gray” (not “gray”, “Grey”, or “grey”). This is because Gray codes are named after Frank Gray, who patented their use for shaft encoders in ...