diff --git a/projects/projectile/index.html b/projects/projectile/index.html
index f577c45..07e03ef 100644
--- a/projects/projectile/index.html
+++ b/projects/projectile/index.html
@@ -2,28 +2,28 @@
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(x_0\)</div>
-      <input type="number" class="form-control" v-model="x0" value="0">
+      <input type="number" class="form-control" v-model="x0">
       <div class="input-group-text">\(m\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(y_0\)</div>
-      <input type="number" class="form-control" v-model="y0" value="50">
+      <input type="number" class="form-control" v-model="y0">
       <div class="input-group-text">\(m\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(v_{0,x}\)</div>
-      <input type="number" class="form-control" v-model="vx0" value="50">
+      <input type="number" class="form-control" v-model="vx0" @input="v0_redraw">
       <div class="input-group-text">\(m.s\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(v_{0,y}\)</div>
-      <input type="number" class="form-control" v-model="vy0" value="50">
+      <input type="number" class="form-control" v-model="vy0" @input="v0_redraw">
       <div class="input-group-text">\(m.s\)</div>
     </div>
   </div>
diff --git a/projects/projectile/index.js b/projects/projectile/index.js
index 9409095..1c408c0 100644
--- a/projects/projectile/index.js
+++ b/projects/projectile/index.js
@@ -10,7 +10,7 @@ let projectile= function (p){
     let width=800
     let height=300
     let dots=[] // Dots that show the projectile path
-    let end=false;
+    p.end=false;
     
     p.setup = function() {
         c=p.createCanvas(Math.min(window.innerWidth,width), height);
@@ -32,7 +32,7 @@ let projectile= function (p){
 
         
     };
-
+    
     // See explanations in html
     function xt(t) {
         return x0+vx0*t
@@ -46,29 +46,39 @@ let projectile= function (p){
     function vy(t) {
         return -g * t + vy0
     }
+
+    p.v0_redraw=function(vx0,vy0){
+        p.draw(p.createVector(vx0,vy0))
+    }
     
-    let draw_vectors=function(x,y,skiparrow=false){
+    let draw_vectors=function(x,y,newV0,skiparrow=false){
         p.push()
+
         p.stroke(199, 141, 107)
         draw_arrow(p,x,y,x+vx(t),y-vy(t),vt,c,skiparrow)
 
         p.stroke(200)
         draw_arrow(p,x0,height-y0,x,y,r,c,skiparrow)
 
-        p.stroke(181, 107, 199)
-        draw_arrow(p,x0,height-y0,x0+vx0,height-(y0+vy0),vy0t,c,skiparrow)
-
         p.stroke(121, 199, 107)
         draw_arrow(p,x0,height-y0,x0,height-y0-50,vj,c,skiparrow,true)
 
         p.stroke(199,119,107)
         draw_arrow(p,x0,height-y0,x0+50,height-y0,vi,c,skiparrow)
 
+        p.stroke(181, 107, 199)
+        if(newV0==null){
+            draw_arrow(p,x0,height-y0,x0+vx0,height-(y0+vy0),vy0t,c,skiparrow)
+        }
+        else{
+            draw_arrow(p,x0,height-y0,x0+newV0.x,height-(y0+newV0.y),vy0t,c,skiparrow)
+        }
+
         p.pop()
     }
     
     
-    p.draw = function() {
+    p.draw = function(newV0=null) {
         p.clear()
         let x=xt(t)
         let y=yt(t)
@@ -83,7 +93,7 @@ let projectile= function (p){
         p.pop()
                
         // Draw vectors
-        draw_vectors(x,y)
+        draw_vectors(x,y,newV0=newV0)
 
         p.push()
         p.stroke(0)
@@ -92,12 +102,12 @@ let projectile= function (p){
         
         // Check simulation state and update it
         if(t>50 || (height-y0)<y){
-            end=true
+            p.end=true
             p.noLoop()
         }
 
         // Update state
-        if(!end){
+        if(!p.end){
             t+=0.1
             dots.push([x,y])
         }
@@ -129,6 +139,13 @@ project_init=function(){
             vy0:vy0,
             vx0:vx0,
             g:g
+        },
+        methods:{
+            v0_redraw:function(){
+                if(p5_instance.end){
+                    p5_instance.v0_redraw(parseFloat(app.vx0),parseFloat(app.vy0))
+                }
+            }
         }
     })
     p5Load()
diff --git a/refresh.sh b/refresh.sh
index e7af57f..6bfb139 100755
--- a/refresh.sh
+++ b/refresh.sh
@@ -47,6 +47,7 @@ do
     sed -i "s#\${beautiful_name}#${beautiful_name}#g" $html
     echo $html
 
+    
     # Create links
     links_file=$(build_links $name)
     sed -i "/\${LINKS}/r $links_file" $html