# Create a list with the tag paths to be updated.
paths = ["[default]Folder/Tag_A","[default]Folder/Tag_B"]
# Create a list with the update values, one value for each path.
values = [1,2]
# Execute the write operation.
system.tag.writeBlocking(paths, values)
If you want to write a hundred tags to 0, do you need a values list with 100 comma separated zeroes?
A great way to learn and play with it to see what works is in your designer click on Tools and then click on Script console. You can type a few lines in the left hand side and click execute, or you can type directly into the REPL on the right hand side and execute statements one at time.
# Create a list with the tag paths to be updated.
paths = ["[default]Folder/Tag_A","[default]Folder/Tag_B"]
# Create a list with the update values, one value for each path.
values = [1,2]
# Execute the write operation.
system.tag.writeBlocking(paths, values)
That happens when posters here fail to use the pre-formatted text button for the code they paste, and then you copy from it. When the forum software sees quoted text that isn't pre-formatted, it makes it "pretty" with curly quotes. Like around "pretty".
Rule of thumb: Don't copy from code that wasn't formatted.