stream.sc

var i = 7

def infStream(): Stream[Int] = i #:: infStream()

val stream = infStream()

println(stream.head)
// 7

println((stream take 3).toList)
// List(7, 7, 7)

i = 8
println((stream take 4).toList)
// List(7, 7, 7, 8)

i = 9
println((stream take 7).toList)
// List(7, 7, 7, 8, 9, 9, 9)