Well, you've got the ant exploring movement looking good, but ants don't go straight back to the nest. It's actually really interesting how the pheromone trail works:
http://mute-net.sourceforge.net/howAnts.shtml
https://www.researchgate.net/profile/Rasoul_Rahmani/publication/255994411/figure/fig1/AS:297939126767630@1448045631559/Fig-1-Cooperative-search-by-pheromone-trails-used-by-an-ant-colony-sequential-order.png
