from cs1robots import *
create_world(avenues = 6, streets =5)

hubo = Robot()
hubo.set_trace("blue")

def turn_right():
    hubo.turn_left()
    hubo.turn_left()
    hubo.turn_left()
    
def traverse_two_columns():
    while(hubo.front_is_clear()):
        hubo.move()
    if(hubo.right_is_clear()):
        turn_right()
        hubo.move()
        turn_right()
        while(hubo.front_is_clear()):
            hubo.move()
        if(hubo.left_is_clear()):
            hubo.turn_left()
            hubo.move()
            hubo.turn_left()
                    
hubo.turn_left()
while( ((hubo.right_is_clear()) & (hubo.front_is_clear())) | ((hubo.left_is_clear()) & (hubo.front_is_clear()))):
    traverse_two_columns()
    
    
    
    
    
def sum_function(a,b,c,d):
    sum = a + b + c + d
    return sum

result = sum_function(1,2,3,4)
print(result)