Google this exact search
1.2+(sqrt(1-(sqrt(x^2+y^2))^2) + 1 - x^2-y^2) * (sin (10000 * (x*3+y/5+7))+1/4) from -1.6 to 1.6
Wait how is this an easter egg? This is google's plotting tool, where somebody came up with a sine function that would fill an egg shaped boundary.
Still cool.
oh, I thought it was put there special in case some one tried to plot that function, but still cool.
Me don't understand anything
Its a mathematical function that looks like an Easter egg when it is plotted out on a graph.
Someone has too much time on their hands.