include(Math)

load("./make2d.rb")
load("./draw_line.rb")

def rw2(m)
  a = make2d(500,500)
  x = 250.0
  y = 250.0
  for i in 1..m
    p = rand()
    x1 = x+10.0*sin(2.0*PI*p)
    y1 = y+10.0*cos(2.0*PI*p)
    draw_line(x,y,x1,y1,a)
    x = x1
    y = y1
  end
  show(a)
end