Copying and Pasting of every nth Column of Data to a new location in Same Worksheet

Hi all,

Im looking to do a macro to copy a range of data (of every nth column) and paste it to another series.

I have a data set (each comes in 3 columns) comprising of Ch1, Ch2 and Ch3. I would like to group the Ch1, Ch2 and Ch3 separately.

For Channel 1,
The macro would aim at copying B2:B21 and copy it to B26:B45, follow by E2:E21 and copy it to C26:45 and so on and so forth.

For Channel 2,
The macro would aim at copying C2:C21 and copy it to B49:B68, follow by F2:F21 and copy it to C49:68 and so on and so forth.

For Channel 3,
The macro would aim at copying D2:D21 and copy it to B71:B90, follow by G2:E21 and copy it to C71:90 and so on and so forth.

I have attached an excel sheet with the desired outcome where the data have been separated. Hope someone can help me with a macro as tons of more data are coming.

Appreciate your help and thanks in advance!