Solved by Kushaj in post #2 
              
              
                In conv2 

6 -> refers to the number of in_channels, after first conv your output had 6 out_channels, so they become input in conv2
16 -> refers to the number of out_channels. It can be any number. It is your choice. You can set it to 100, 10 anything.
3 -> kernel_size again is your choice. But kern…