def strasse(x0,y0,z0,laenge):
    blocks.fill(LIGHT_GRAY_CONCRETE,world(x0,y0,z0),world(x0+laenge,y0,z0+5))
    for i in range(x0,x0+laenge,2):
        blocks.place(CONCRETE,world(i,y0,z0+2))


strasse(74,3,-31,140)