Android Compose Hints

// To create an object

val darkTheme = MutableStateFlow(false)

// To change the value

darkTheme.value = true

// To Consume the value

darkTheme.collectAsState().value

Column - Vertical layout

Row - Horizontal Layout

Stack - Overlapping elements

Constraint Layout 

Row {  this:// Row Scope

}

Hint: Background color should be added first before padding. Under the module chains