Green and blue are both branches, but they occur at different times. Green is produced first. For example, Xiao Wang pulled the green branch code development, and later an employee Lao Wang came and he also pulled the blue branch code development from the master. Xiao Wang developed it first, so it was completed not long after Lao Wang developed it. He merged the code into the blue branch, and Lao Wang continued to develop. that's all.
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Branch and merge. I don't quite understand what you don't quite understand.
Green and blue are both branches, but they occur at different times. Green is produced first. For example, Xiao Wang pulled the green branch code development, and later an employee Lao Wang came and he also pulled the blue branch code development from the master. Xiao Wang developed it first, so it was completed not long after Lao Wang developed it. He merged the code into the blue branch, and Lao Wang continued to develop. that's all.