diff --git a/wave_simulate.html b/wave_simulate.html
index bc35a1c..493d7a9 100755
--- a/wave_simulate.html
+++ b/wave_simulate.html
@@ -36,7 +36,7 @@
         </p>
 
         <p>
-        <input type="checkbox" id="right_second" checked />
+        <input type="checkbox" id="right_second" />
         <label for="right_second" alt="">Вторая половина справа - другая среда</label>
         </p>
 
@@ -45,6 +45,26 @@
         <label for="generate" alt="">Генерирование волны слева</label>
         </p>
         
+
+        <p>
+        <input type="checkbox" id="vel_graph_on" checked />
+        <label for="vel_graph_on" alt="">График скорости</label>
+        <input type="range" id="vel_graph_scale_range" for="omega" name="volume" min="0" max="10000" value="300"
+            oninput='document.getElementById("vel_graph_scale").value = document.getElementById("vel_graph_scale_range").value / 100;'>
+        <input id = "vel_graph_scale" type="number" value="3.0" step=".1"/>
+        <label for="vel_graph_scale" alt="">Маштаб</label>
+        </p>
+
+        <p>
+        <input type="checkbox" id="force_graph_on" checked />
+        <label for="force_graph_on" alt="">График сил</label>
+        <input type="range" id="force_graph_scale_range" for="omega" name="volume" min="0" max="10000" value="3000"
+            oninput='document.getElementById("force_graph_scale").value = document.getElementById("force_graph_scale_range").value / 100;'>
+        <input id = "force_graph_scale" type="number" value="30.0" step=".1"/>
+        <label for="force_graph_scale" alt="">Маштаб</label>
+        </p>
+
+
         <p>
         <input type="range" id="length_range" for="omega" name="volume" min="0" max="200" value="50"
             oninput='document.getElementById("length").value = document.getElementById("length_range").value / 100;'>
@@ -74,7 +94,7 @@
         </p>
 
         <p>
-        <input type="range" id="trenie_range" for="omega" name="volume" min="-0" max="1000" value="980"
+        <input type="range" id="trenie_range" for="omega" name="volume" min="0" max="1000" value="980"
             oninput='document.getElementById("trenie").value = document.getElementById("trenie_range").value / 100;'>
         <input id = "trenie" type="number" value="0.98" step=".01"/>
         <label for="trenie" alt="">Трение</label>
@@ -112,6 +132,14 @@ trenie = 0.0
 acsel = 0.0
 acsel_second = 0.0
 
+vel_graph_on = False
+vel_graph_scale = 0.0
+
+force_graph_on = False
+force_graph_scale = 0.0
+
+y_scale = 0.3
+
 y_values = []
 vel_values = []
 
@@ -142,6 +170,14 @@ def DrawAxesScreen():
     DrawLine(x1, y1, x1, y2, lw, style)
     DrawLine(x2, y1, x2, y2, lw, style)
 
+    style1 = 'blue'
+    base_y = ym - (ym - y1) * y_scale * 1
+    DrawLine(x1, base_y, x2, base_y, lw, style1)
+
+    base_y = ym - (ym - y1) * y_scale * (-1)
+    DrawLine(x1, base_y, x2, base_y, lw, style1)
+
+
 def base_func(length, omega):
     return math.sin(length * omega)
 
@@ -156,6 +192,12 @@ def reload():
     global trenie
     global acsel
     global acsel_second
+    
+    global vel_graph_on
+    global vel_graph_scale
+
+    global force_graph_on
+    global force_graph_scale
 
     max_step = int(document["max_step"].value)
     y_values = [0.0] * max_step
@@ -170,6 +212,11 @@ def reload():
     acsel = float(document["acsel"].value)
     acsel_second = float(document["acsel_second"].value)
 
+    vel_graph_on = document["vel_graph_on"].checked
+    vel_graph_scale = float(document["vel_graph_scale"].value)
+    force_graph_on = document["force_graph_on"].checked
+    force_graph_scale = float(document["force_graph_scale"].value)
+
 def recalculate():
     global max_step
     global y_values
@@ -182,6 +229,12 @@ def recalculate():
     global acsel
     global acsel_second
 
+    global vel_graph_on
+    global vel_graph_scale
+
+    global force_graph_on
+    global force_graph_scale
+
     global omega
 
     DrawBlackScreen()
@@ -195,8 +248,9 @@ def recalculate():
     y2 = canvas.height - y1
     ym = canvas.height/2
     style = 'white'
+    style_vel = 'green'
+    style_force = 'red'
     line_width_scale = 4.0
-    y_scale = 0.3
 
     cur_x = 0
     prev_x = cur_x
@@ -210,17 +264,32 @@ def recalculate():
             y_values[i] = base_func(length, omega)
             vel_values[i] = 0.0
         else:
+            force = 0.0
             if i != max_step - 1:
                 ac = acsel
                 if right_second and i > max_step / 2:
                     ac = acsel_second
-                vel_values[i] += (y_values[i - 1] - y_values[i]) * ac + (y_values[i + 1] - y_values[i]) * ac
+                force = (y_values[i - 1] - y_values[i]) * ac + (y_values[i + 1] - y_values[i]) * ac
+                vel_values[i] += force
                 vel_values[i] *= trenie
                 y_values[i] += vel_values[i]
             base_y = ym - (ym - y1) * y_scale * y_values[i]
             base_y_last = ym - (ym - y1) * y_scale * y_values[i - 1]
             
             DrawLine(prev_x, base_y_last, cur_x, base_y, 1.0 * line_width_scale, style)
+            
+            if vel_graph_on:
+                base_y = ym - (ym - y1) * vel_graph_scale * vel_values[i]
+                base_y_last = ym - (ym - y1) * vel_graph_scale * vel_values[i - 1]
+            
+                DrawLine(prev_x, base_y_last, cur_x, base_y, 1.0, style_vel)
+
+            if force_graph_on:
+                base_y = ym - (ym - y1) * force_graph_scale * force
+                base_y_last = ym - (ym - y1) * force_graph_scale * force
+            
+                DrawLine(prev_x, base_y_last, cur_x, base_y, 1.0, style_force)
+                
 
         prev_x = cur_x