This might be more explanatory.

LED = 0 -> PORTB.0[0] -> PORTB.0 -> pin 6
LED = 1 -> PORTB.0[1] -> PORTB.1 -> pin 7
LED = 2 -> PORTB.0[2] -> PORTB.2 -> pin 8
LED = 3 -> PORTB.0[3] -> PORTB.3 -> pin 9
LED = 4 -> PORTB.0[4] -> PORTB.4 -> pin 10
LED = 5 -> PORTB.0[5] -> PORTB.5 -> pin 11
LED = 6 -> PORTB.0[6] -> PORTB.6 -> pin 12
LED = 7 -> PORTB.0[7] -> PORTB.7 -> pin 13


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