Look at the two pictures below. Because there is a bunker near the pin, you really don’t want shoot straight for it. It would be better to start the ball closer to the center of the green and curve it into the pin. If the curve doesn’t come off, you’re still OK.
In picture 1, you see how to set up for hitting a draw. Aim your stance at the target (yellow circle), aim the clubface to the right of it (blue circle), and swing through the ball toward a spot even farther to the right (red circle).
You may click the picture to enlarge it and see this more clearly.
Even though the clubface is open to the target line, it is closed to the swing line, and the ball will curve to the left.
To fade the ball, set up a show in picture 2. Aim your stance to the left (red circle) of the target (yellow circle), and aim the clubface between the two (blue circle). Swing through the ball toward the red circle.
The clubface will be open to the swing line, start off to the right of it, and curve further right toward the target.
In both cases, it is most important that you think of hitting the ball straight toward the red circle. Do you see where the tree line in the background drops down to a low point behind the red circle? That is where you should think of hitting the ball, in each case. Your setup and swing path will curve the ball in the direction you want it to go.
If instead you have the target in mind, you could unconsciously try to steer the ball in the direction you want it to go, ruining everything.
Don’t get too caught up by the circles being unevenly spaced here. They might or might not be the exact positions for your golf, but their relative positions and their proximity to the pin are. Hit little draws, and little fades, not big ones.