Modifying a child node thru parent node programmatically

Using Swift
1

Hi,

How do i modify "label" from parent "block" node thru an instance of "block" in the code?

Screen Shot 2020-04-25 at 1.06.34 pm

then i have this in my code,
block = self .childNode(withName: "//block") as ? SKSpriteNode

i want to change the value of "label" thru "block"..

thanks!
xenogaia2003