Step 1 - Start with a pencil and draw the basic shape of the head, divide into two parts.
Step 2 - Draw two oval shapes for the body, make sure not to draw them too far from each other.
Step 3 - Connect the oval shapes using curved lines and then connect the head.
Step 4 - Draw the rear leg, we're going to start with the leg closer to us, divide it to 4 parts, start with the first elongated shape, notice it's going a bit back and its size, continue drawing the other parts until the hoof.
Step 5 - Do the same with the other leg, notice that this one is more strait and the upper part is longer.
Step 6 - Draw the horse's front legs the same technique we used before, start with the leg closer to us.
Step 7 - Sketch the tail and add more details to the rear legs and neck.
Step 8 - Draw an eye, mouth and nostril. Add his ears and hair between them, draw the back part of his mane.
Step 9 - Follow your guidelines with a black marker or pen and erase the pencil lines after.
Step 10 - Color your horse, notice I use two colors for his face and the lower part of the legs.