Made just for fun the BASIC-like DSL in Kotlin

Basic.kt

class Basic {
  data class Var(val name: String)

  class Let {
    infix fun BE(value: Any): Binding = TODO()
  }

  class Binding {
    infix fun MOD(other: Any): Binding = TODO()
  }

  class For {
    infix fun IN(range: IntRange) {}
  }

  class If {
    infix fun EQUALS(value: Any): Then = TODO()
  }

  class Then {
    infix fun THEN(line: Int): Else = TODO()
  }

  class Else {
    infix fun ELSE(line: Int) { TODO() }
  }

  class Context {
    val A = Var("A")
    val B = Var("B")
    val C = Var("C")
    val D = Var("D")
    val E = Var("E")

    infix fun Int.PRINT(message: String) { TODO() }
    infix fun Int.PRINT(name: Var) { TODO() }
    infix fun Int.GOTO(line: Int) { TODO() }
    infix fun Int.LET(name: Var): Let = TODO()
    infix fun Int.FOR(name: Var): For = TODO()
    infix fun Int.IF(name: Var): If = TODO()
    infix fun Int.NEXT(name: Var) { TODO() }
  }

  fun build(body: Context.() -> Unit) {
    Context().apply(body)
  }
}

fun basic(script: Basic.Context.() -> Unit) {
  Basic().build(script)
}

basic {
   10 PRINT "-= FizzBuzz =-"
   20 FOR A IN 1..20
   30   LET B BE A MOD 3
   40   LET C BE A MOD 5
   50   IF B EQUALS 0 THEN 90
   60   IF C EQUALS 0 THEN 120
   70   PRINT A
   80   GOTO 150
   90   IF C EQUALS 0 THEN 140
  100   PRINT "fizz"
  110   GOTO 150
  120   PRINT "buzz"
  130   GOTO 150
  140   PRINT "fizzbuzz"
  150 NEXT A
}