La video de JP Bouvet.

Step 1, Short and long patterns

Short (on the 2)

X:1
T:short 1
M:4/4
L:1/8
|: C2 B2 CC BC | zC B2 CC B2 :|
X:2
T:short 2
M:4/4
L:1/8
|: CC B2 C2 BC | zC B2 CC B2 :|

Long (on the 2s) QQ.8Q 88Q.8Q on 2s

X:3
T:long 1
M:4/4
L:1/8
|: C2 B2 zC B2 | CC B2 zC B2 :|

Long (2s) and short (4s)

Same as last one.

Step 2, Shifting to the upbeat

Take QQ88Q QQ88Q Move 4 (b), then 45 (c), then 456 (d) one eighth late.

Demo with ups and downs

Early backbeat

X:4
T:early 1
M:4/4
L:1/8
|: C2 B2 CB z2 | C2 B2 CB zC :|
X:5
T:early 2
M:4/4
L:1/8
|: C2 B2 CB zC | zC B2 CC B2 :|

Mix step 1 and step 2, and add adaptations