4 Characters from Dr. Seuss's Sleep Book who ride on masked camel-like creatures trying to sell Zizzer-Zoof seeds.
Their business they are handling currently turns out to be a complete fail everyday because they couldn't seem to get or find any customers to sell the seeds to nor make any money, because none of them needed their seeds to plant. But, they the salesmen believed that tomorrow would come where they will finally succeed in making a sale offering the seeds to money paying customers.
At the end of the day they lie somewhere on the grass sleeping hoping for tomorrow.