Menu1
Child1
Grandchild1
Greatgrandchild1
Greatgrandchild2
Greatgrandchild3
Greatgrandchild4
Greatgrandchild5
Grandchild2
Grandchild3
Grandchild4
Grandchild5
Child2
Child3
Child4
Child5
Menu2
Menu3
Menu4
Menu5
https://webdesignday.jp/inspiration/technique/css/5793/