Susans English Toffee

1/2 pound butter
1/4 cup water
1/4 cup white Karo syrup
1 cup sugar
1 cup chopped pecans
4 Hershey bars or milk chocolate chips
combine all ingredients(except Hershey bars) in a heavy saucepan. Cook at medium heat until mixture turns brown in color. Spread quickly on cookie sheet and put chocolate bars on top...Spread until candy is coated. Cool and break into pieces with handle of a knife.