In a large bowl, mix together cream cheese, sour cream and taco seasoning. Transfer to a round pie dish. Spread guacamole on top of mixture. Spread cheese around the edge of the pie dish. Evenly spread lettuce, tomatoes, olives and green onions on top of cheese. In a small bowl, combine ingredients for spider web mixture. The consistency should be slightly thinner than sour cream. Transfer spider web mixture into a piping bag fitted with a fine tip Pipe mixture onto guacamole in the shape of a spider web. Cut remaining olives into spider shaped and place them on the web. Chill until ready to serve.