wad i'll normally do is hum a tune to myself and play it on my guitar after having learnt all the notes in it.
or another way u can do is to just jumble the notes up in a scale and play it
for example for a C major scale it's C,D,E,F,G,A,B
maybe u could create a solo by jumbling the notes up like C,G,D,B,E,C,G,E,D etc...i'm juz giving an example
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