psudocode

Main:
    CALL initColony
    FOR each_ant in colony
        CALL updateAnt
    END FOR


Function initColony:
    SET patience to patience_max
    SET distance_covered = 0
END Function


Function updateAnt:
    FOR direction in front semicircle
        CALL updatePheromonesIntensity
        IF ant_mode is find_food
            CALL secretHomePheromone
            IF found_food THEN
                SET patience to patience_max
                SET ant_mode to deliver_food
                SET direction to (direction + PI)
                RETURN
            IF food_pheromone_intensity == 0
                SET patience to patience_max
                move ant randomly
            ELSE IF food_pheromone_intensity < caution_pheromone_intensity
                CALL secretPheromoneCautionPheromone
                move ant to follow food_pheromone direction
            ELSE 
                move ant randomly
            END IF
        CALL move_ant
END Function


Function secretHomePheromone
    SET coef = 0.01
    intensity = 1000*exp(-coef * distance_covered++)
    deposit home_pheromone with intensity
END Function


Function secretPheromoneCautionPheromone
    SET coef = 0.01
    intensity = 1000*exp(-coef * patience--)
    deposit home_pheromone with intensity
END Function