You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: blackriper.go
    path of file: ./repos/retos-programacion-2023/Retos/Reto #33 - TETRIS [Difícil]/go
    
    the code of the file until where you have to start completion: package main

// nota : al rotar la pieza vuelve a su posicion inicial
import (
	"fmt"
	"strings"
)

// definir metodos de trabajo
type Tetris interface {
	PlayTetris(
    
func DrawTetris(cord [][]int) {
	var file int
	var cube string
	for file < 10 {
		for c := 0; c < 10; c++ {
			switch {
			case cord[0][0] == c && cord[1][0] == file:
				cube = cube + "ðŸ”³"
			case cord[0][1] == c && cord[1][1] == file:
				cube = cube + "ðŸ”³"
			case cord[0][2] == c && cord[1][2] == file:
				cube = cube + "ðŸ”³"
			case cord[0][3] == c && cord[1][3] == file:
				cube = cube + "ðŸ”³"
			default:
				cube = cube + "ðŸ”²"

			}
		}
		fmt.Println(cube)
		file++
		cube = ""
	}
}