How can I display pictures using an if/else statement for a coin flip app?

How can i display one image(heads) if coinFlip is equal to 1, and another image(tails) if its 2? Sorry if this is a stupid question, this is my first Win-Form app.

        private void button1_Click(object sender, EventArgs e){

        Random rand = new Random();

        int heads = 1;
        int tails = 2;
        int coinFlip = rand.Next(heads, tails);

        if (coinFlip == heads)
        {
            //  Display heads picture
        }

        else
        {
            //  Display tails picture
        }

    }