diff --git a/src/client.rs b/src/client.rs
index f139d81..bbff1d7 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -42,7 +42,7 @@ impl Client {
         let disp_cnt: u32 = deserialize(&buffer).unwrap();
 
         if disp_cnt < 1 {
-            return Err(Error::new(NotConnected, "[ERR] authorization failed"));
+            return Err(Error::new(ConnectionRefused, "[ERR] authorization failed"));
         }
 
         /* receive server's current display configurations */
@@ -58,7 +58,7 @@ impl Client {
         tcp_stream_read!(self.tcp, buffer);
 
         if let HandshakeStatus::HandshakeErr = deserialize(&buffer).unwrap() {
-            return Err(Error::new(InvalidData, "[ERR] attach request rejected"));
+            return Err(Error::new(ConnectionRefused, "[ERR] request rejected"));
         };
 
         Ok(())
diff --git a/src/display.rs b/src/display.rs
index 46b4917..d791112 100644
--- a/src/display.rs
+++ b/src/display.rs
@@ -1,3 +1,5 @@
+use std::io::{Error, ErrorKind::*};
+
 use display_info::DisplayInfo;
 use rand;
 use serde::{Deserialize, Serialize};
@@ -124,3 +126,40 @@ impl Display {
         }
     }
 }
+
+pub fn create_warpzones(a: &mut Vec<Display>, b: &mut Vec<Display>, eq: bool) -> Result<(), Error> {
+    for (i, disp) in a.iter_mut().enumerate() {
+        for (j, target) in b.iter_mut().enumerate() {
+            if eq && i >= j {
+                continue;
+            }
+
+            /* check overlapping */
+            if disp.is_overlap(target.clone()) {
+                return Err(Error::new(
+                    InvalidInput,
+                    "[ERR] two displays are overlapping",
+                ));
+            }
+
+            /* add warpzone to each other if touching */
+            if let Some((start, end, direction)) = disp.is_touch(target.clone()) {
+                disp.warpzones.push(WarpZone {
+                    start,
+                    end,
+                    direction,
+                    to: target.owner,
+                });
+
+                target.warpzones.push(WarpZone {
+                    start,
+                    end,
+                    direction: direction.reverse(),
+                    to: disp.owner,
+                });
+            }
+        }
+    }
+
+    Ok(())
+}
diff --git a/src/server.rs b/src/server.rs
index 1aec1eb..e96b06a 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -25,7 +25,7 @@ pub struct Server {
 
 impl Server {
     pub fn new() -> Result<Server, Error> {
-        let disp: Vec<Display> = DisplayInfo::all()
+        let mut disp: Vec<Display> = DisplayInfo::all()
             .expect("[ERR] failed to get system displays")
             .into_iter()
             .map(|x| Display::from(x, SERVER_CID))
@@ -37,9 +37,20 @@ impl Server {
 
         let system = disp.iter().map(|x| x.id).collect();
         let current = disp.iter().find(|x| x.is_primary).unwrap_or(&disp[0]).id;
-        let displays = Arc::new(RwLock::new(disp.into_iter().map(|x| (x.id, x)).collect()));
+        let displays = Arc::new(RwLock::new(
+            disp.iter().map(|x| (x.id, x.clone())).collect(),
+        ));
+
+        let mut dummy = disp.clone();
+
+        /* create warpzone twice with reverse order to write correctly in disp, not dummy */
+        if let Err(_) = create_warpzones(&mut disp, &mut dummy, true) {
+            return Err(Error::new(InvalidData, "[ERR] system display init failed"));
+        };
 
-        // TODO: set warpzones
+        if let Err(_) = create_warpzones(&mut dummy, &mut disp, true) {
+            return Err(Error::new(InvalidData, "[ERR] system display init failed"));
+        };
 
         Ok(Server {
             clients: Arc::new(RwLock::new(HashMap::new())),
diff --git a/src/utils.rs b/src/utils.rs
index c3c8fce..991231a 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -9,9 +9,8 @@ pub enum HandshakeStatus {
 
 pub fn print_displays() {
     println!("[INF] detected system displays:");
-    let displays = DisplayInfo::all().unwrap();
 
-    for display in displays {
+    for display in DisplayInfo::all().unwrap() {
         println!("  {:?}", display);
     }
 }