bufferedChanel

package main

import (
	"log"
	"time"
)

var foo chan int

func fillFoo() {
	for i := 0; i < 20; i++ {
        	//this will get blocked beyond 15
		foo <- i
		log.Println("pushed", i)
	}
	close(foo)
}

func main() {

	foo = make(chan int, 15)

	go fillFoo()

	for {
		bar := <-foo
		log.Println("popped", bar)
		time.Sleep(2 * time.Second)
	}

}