Added counter exercise

golangr/counter/go.mod

@@ -0,0 +1,3 @@
+module counter
+
+go 1.21.6

golangr/counter/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+var delay float64
+var num int16
+
+func clear() {
+	fmt.Print("\033[H\033[2J")
+}
+
+func main() {
+
+	if len(os.Args) != 2 {
+		fmt.Println("Not enough arguments")
+		os.Exit(1)
+	}
+
+	fmt.Println("How much delay in seconds?")
+	timer, err := fmt.Scanln(num)
+	_ = timer
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	for i := 0; true; i++ {
+		time.Sleep(100 * time.Millisecond)
+		clear()
+		fmt.Println(i)
+	}
+}