diff --git a/spider.py b/spider.py
new file mode 100644
index 0000000..408bcb4
--- /dev/null
+++ b/spider.py
@@ -0,0 +1,185 @@
+import copy
+import math
+from PIL import Image, ImageDraw
+
+class Board:
+    def __init__(self, size = 0):
+        self.size = size
+        self.board = {}
+ 
+        #create empty board as a dictionary
+        self.b2 = {}
+        for p in range(-self.size,self.size):
+            for q in range(-self.size, self.size):
+                if self.inBoard(p,q):
+                    if not p in self.board:
+                        self.board[p] = {}
+                    self.board[p][q] = 0
+ 
+                    if not q in self.b2:
+                        self.b2[q] = {}
+                    self.b2[q][p] = 0
+ 
+        #this is for visualization and to synchronize colors between png/js
+        self._colors = {}
+        self._colors[-1] = "#fdca40" #sunglow
+        self._colors[0] = "#ffffff" #white
+        self._colors[1] = "#947bd3" #medium purple
+        self._colors[2] = "#ff0000" #red
+        self._colors[3] = "#00ff00" #green
+        self._colors[4] = "#0000ff" #blue
+        self._colors[5] = "#566246" #ebony
+        self._colors[6] = "#a7c4c2" #opan
+        self._colors[7] = "#ADACB5" #silver metalic
+        self._colors[8] = "#8C705F" #liver chestnut
+        self._colors[9] = "#FA7921" #pumpkin
+        self._colors[10] = "#566E3D" #dark olive green
+ 
+ 
+ 
+    def inBoard(self,p,q):
+        """ return True if (p,q) is valid coordinate """
+        return (q>= 0) and (q < self.size) and (p >= -(q//2)) and (p < (self.size - q//2))
+ 
+ 
+    def rotateRight(self,p,q):
+        pp = -q
+        qq = p+q
+        return pp,qq
+ 
+    def rotateLeft(self, p,q):
+        pp = p+q
+        qq = -p
+        return pp, qq
+ 
+ 
+ 
+    def saveImage(self, filename):
+        """ draw actual board to png
+        """
+ 
+        cellRadius = 60
+        cellWidth = int(cellRadius*(3**0.5))
+        cellHeight = 2*cellRadius
+ 
+        width = cellWidth*self.size + cellRadius*3
+        height = cellHeight*self.size
+ 
+        img = Image.new('RGB',(width,height),"white")
+ 
+        draw = ImageDraw.Draw(img)
+ 
+        lineColor = (50,50,50)
+ 
+ 
+        for p in self.board:
+            for q in self.board[p]:
+                cx = cellRadius*(math.sqrt(3)*p + math.sqrt(3)/2*q) + cellRadius
+                cy = cellRadius*(0*p + 3/2*q) + cellRadius
+ 
+                pts = []
+                for a in [30,90,150,210,270,330]:
+                    nx = cx + cellRadius * math.cos(a*math.pi/180)
+                    ny = cy + cellRadius * math.sin(a*math.pi/180)
+                    pts.append(nx)
+                    pts.append(ny)
+                color = "#ff00ff" #pink is for values out of range -1,..10
+                if self.board[p][q] in self._colors:
+                    color = self._colors[self.board[p][q]]
+ 
+                draw.polygon(pts,fill=color)
+                pts.append(pts[0])
+                pts.append(pts[1])
+                draw.line(pts,fill="black", width=1)
+                draw.text([cx-3,cy-3], "{} {}".format(p,q), fill="black", anchor="m")
+        img.save(filename)
+ 
+ 
+    def loadBoard(self, filename):
+        board = {}
+        fread = open(filename, "rt")
+        size = -1
+        for line in fread:
+            p,q,value = list(map(int, line.strip().split()))
+            size = max(size, q)
+            if p not in board:
+                board[p] = {}
+            board[p][q] = value             
+        fread.close()
+        self.board = board
+        self.size = size+1
+        
+import sys        
+# alternativa: nacteni ze souboru
+b = Board()
+b.loadBoard(sys.argv[1])    
+ 
+# prochazeni radku/sloupce:
+b_copy={}
+for p in b.board:
+   b_copy[p]={} 
+   for q in b.board[p]:
+      b_copy[p][q]=b.board[p][q]
+      if b.board[p][q]==2:
+        spider_p = p
+        spider_q = q
+
+smer=((0,-1),(1,-1),(1,0),(0,1),(-1,1),(-1,0))
+def okoli(b, p, q):
+  o = [0]*6
+  for i in range(6):
+     p2, q2 = smer[i]
+     if b.inBoard(p+p2, q+q2):
+       o[i]=b.board[p+p2][q+q2]
+     else:
+       o[i]=-1
+  return o
+
+def spider_tah1(p,q,o):
+  mozne_tahy=[]
+  for i in range(6):
+    if o[i]==0 and ((o[(i-1)%6]==0 and o[(i+1)%6]==1)
+                  or(o[(i-1)%6]==1 and o[(i+1)%6]==0)):
+      mozne_tahy.append([p+smer[i][0],q+smer[i][1]])
+  return mozne_tahy                   
+
+o_spider = okoli(b, spider_p, spider_q)
+print(o_spider)
+
+komponenty=0
+for i in range(6):
+  if o_spider[i]==1 and o_spider[(i+1)%6]!=1:
+    komponenty+=1
+    
+if komponenty>1:
+  flood_fill()
+  
+pos=[[spider_p, spider_q]]
+dont_go_back = pos[:]
+b.board[spider_p][spider_q]=0
+
+for i in range(3):
+  pos2=[]
+  print(i,pos)
+  for p,q in pos:
+    mozne = spider_tah1(p,q,okoli(b,p,q))
+    for x in mozne:
+      if not x in dont_go_back:
+        print("jdu vpred",x)
+        pos2.append(x)
+        dont_go_back.append(x)
+      else:
+        print("jdu zpet",x)  
+  pos=pos2
+pos2.sort()
+print(pos2)
+
+
+
+
+
+
+ 
+ 
+ 
+