TO PREPARE MASK MAKE-UP: In small bowl mix 3 tablespoons Argo corn starch and 1 tablespoon flour. Gradually stir in 3/4 cup Karo corn syrup and 1/4 cup water until smooth. Pour about 1/4 cup into each of 4 small bowls or paper cups. Leave one batch untinted. Color three remaining batches with desired liquid or paste food colors. (Use about 1/2 tsp liquid or 1/4 tsp paste food color for each batch. Paste food colors provide more intense color.) For additional colors, prepare more make-up. TO APPLY MASK MAKE-UP: Separate 3 to 4 (2-ply) white facial tissues into single layers; tear lengthwise into 2-inch wide strips. Using cotton swabs or a small brush, paint a generous coat of the untinted make-up on forehead. Carefully place a strip of tissue over the painted area. Pat firmly with finger tips. Brush additional untinted make-up over any dry areas on tissue. Continue painting and covering the rest of the face with tissue, one area at a time. DO NOT PAINT EYELIDS OR AREA AROUND EYES. Use small pieces of torn tissue to cover any blank spots. Let dry about 15 minutes. Stir colored batches just before using. Using one color at a time, paint on colors as desired; let dry slightly before using another color. TO REMOVE MASK MAKE-UP: gently peel tissue off face; wash with soapy water. For a deeper, smoother candy-color effect, use several coats of the same color; let dry slightly between coats. Use cotton to build up eyebrows, nose or chin. Apply while make-up is still damp. Paint cotton with untinted make-up; cover with tissue and paint with desired color. To make a beard, apply cotton along jawline and on chin; paint with desired color. For a ghostly effect, dust face with flour after painting with desired colors. For "warts," stick on puffed wheat cereal with untinted make-up; paint with desired color.