diff --git a/__pycache__/algrebra.cpython-310.pyc b/__pycache__/algrebra.cpython-310.pyc
new file mode 100644
index 0000000..bdfbb13
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diff --git a/__pycache__/grad.cpython-310.pyc b/__pycache__/grad.cpython-310.pyc
new file mode 100644
index 0000000..953c057
Binary files /dev/null and b/__pycache__/grad.cpython-310.pyc differ
diff --git a/__pycache__/test.cpython-310.pyc b/__pycache__/test.cpython-310.pyc
new file mode 100644
index 0000000..67d84ef
Binary files /dev/null and b/__pycache__/test.cpython-310.pyc differ
diff --git a/__pycache__/window.cpython-310.pyc b/__pycache__/window.cpython-310.pyc
new file mode 100644
index 0000000..7e95055
Binary files /dev/null and b/__pycache__/window.cpython-310.pyc differ
diff --git a/grad.py b/grad.py
index 66acc64..ace8b55 100644
--- a/grad.py
+++ b/grad.py
@@ -22,11 +22,16 @@ def rgb_to_hex(color):
 
 
 def main(wind):
+    wind.points = [(0, 0)] + wind.points + [(wind.width, wind.height)]
+    
+    [print(wind.points)]
+    
     L = interpol(wind.points)
     dL = L.diff()
     N = len(wind.points)
     perp = []
 
+
     for p in wind.points:
         k = dL.value(p[0])
         if k==0:
@@ -36,18 +41,21 @@ def main(wind):
             b = p[1] - k*p[0]
             perp.append(Poly([b, k]))
 
-    colors = [(0, Vector(0, 0, 0))]
+    colors = []
     for i in range(N):
         colors.append((wind.points[i][0], Vector(randint(0, 255), randint(0, 255), randint(0, 255))))
-    colors.append((width, Vector(255, 255, 255)))
+    #colors.append((width, Vector(255, 255, 255)))
 
+    print(colors)
+    
+    #colors = [(0, Vector(0, 0, 0))] + colors + []
+    
     color_func = interpol(colors).tuple()
 
-    step = 0.5
+    step = 0.1
     for dx in range(round(width/step)):
         x=dx*step
         color = color_filter(comp.value(x) for comp in color_func)
-        print(x, color)
         """ 
         k = dL.value(x)
         if k == 0:
@@ -58,8 +66,9 @@ def main(wind):
             for y in range(width*2):
                 wind.canvas.create_line(y/2, k*y/2+b, y/2+1, k*(y/2+1)+b, fill=rgb_to_hex(color)) 
         """
-        wind.canvas.create_line(x, L.value(x), x+step, L.value(x+step), fill=rgb_to_hex((color)), width=5)
+        wind.canvas.create_line(x, L.value(x), x+step, L.value(x+step), fill=rgb_to_hex((color)), width=10)
 
+        wind.points = wind.points[1:-2]
         
     for i in range(N):
         wind.canvas.create_oval(colors[i][0] - 3, L.value(colors[i][0]) - 3, colors[i][0] + 3, L.value(colors[i][0]) + 3, fill=rgb_to_hex(colors[i][1].tuple()))
@@ -69,8 +78,8 @@ def main(wind):
 
 if __name__ == "__main__":
     title = 'Huy'
-    width = 1000
-    height = 500
+    width = 1200
+    height = round(width*1080/1920)
     wind = window(title, width, height)
 
     def on_enter_pressed(event):
@@ -78,4 +87,4 @@ if __name__ == "__main__":
     
     wind.bind("<Return>", on_enter_pressed)
 
-    wind.mainloop()
\ No newline at end of file
+    wind.mainloop()
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..07a0618
--- /dev/null
+++ b/test.py
@@ -0,0 +1,12 @@
+def mult(p, q):
+    n = len(p) - 1
+    m = len(q) - 1
+    p += [0]*m
+    q += [0]*n
+    result = [0]*(n+m+1)
+    for k in range(n+m+1):
+            for l in range(k+1):
+                result[k] += p[l]*q[k-l]
+    return result[::-1]
+
+print(mult([1, 1, 1, 1], [1, 1, 1]))