blues and jazz

by somebody from youtube

+1   -2   +2   =>
-3   +3   -4   +4    =>
+4   -4   +3   -3    =>
+1   -2   +2    =>
 
+1   +1   -2   -2   +2
-3   -3   +3   +3   -4   -4  +4
<=> +5
+4 <=> +5  -4   -4   +3   +3  
-3
+1  +1  -2   +2
=>: hold, vibrato
<=>: variable