Check for similar values in select columns (Unanimously Agreed or Not)

[Thilina]

I have an app with 4 statuses as [L1]-[L4] set by 4 different people, if they are all the same it should move to the next stage, I want to create a slice to filter rows where [L1]-[L4] does not contain the same value. What should I do for this. I am still learning the ropes with only a couple of appsheets under my belt so any help would be greatly appreciated!