diff --git a/src/visualization.jl b/src/visualization.jl
index 5ba8699..c87bef6 100644
--- a/src/visualization.jl
+++ b/src/visualization.jl
@@ -90,11 +90,15 @@ function param_box!(grid, row, labeltxt, observable::Observable)
     on(box.stored_string) do s
         try
             observable[] = parse(Float64, s)
-            println("changed $labeltxt to $s")
+            box.displayed_string[] = s
         catch
             @warn "Invalid input for $labeltxt: $s"
         end
     end
+    on(observable) do val
+        box.displayed_string[] = string(val)
+    end
+    return box
 end
 
 function build_ui(U, V, Du, Dv, F, k, params_obs, heat_obs)
@@ -129,7 +133,6 @@ function build_ui(U, V, Du, Dv, F, k, params_obs, heat_obs)
     param_box!(textboxgrid, 3, "Feed", F)
     param_box!(textboxgrid, 4, "kill", k)
 
-    println("aufruf")
 
     running = Observable(false)
     on(running) do r
@@ -157,22 +160,12 @@ function build_ui(U, V, Du, Dv, F, k, params_obs, heat_obs)
     end
 
     on(btn_Jaguar.clicks) do _
-
         Du[] = 0.142
         Dv[] = 0.078
         F[] = 0.0617
         k[] = 0.062
 
-        if !running[]
-            running[] = true
-            U .= 1.0
-            V .= 0.0
-            @async while running[]
-                multi_step!((U, V), stepsize[], heat_obs, params_obs)
-                sleep(0.0015)
-            end
-        end
-
+        reset!(U, V, heat_obs)
         starting_points!(U, V)
         heat_obs[] = copy(U)
     end
@@ -187,7 +180,6 @@ function build_ui(U, V, Du, Dv, F, k, params_obs, heat_obs)
             return
         end
         x, y = pt
-        println("params_obs[].N, ", params_obs[].N)
         i, j = coord_to_index(x, y, params_obs[].N)
 
         # get corners of square that will get filled with concentration