diff --git a/src/index.js b/src/index.js
index d25ae68..1283e82 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,6 +1,31 @@
 function diamond(size) {
   // your code
-  return;
+  //Solucion
+  if (size <= 1 || size % 2 === 0) return null;
+  let printLn = (size, dots) => {
+    let spaces = (size - dots) / 2;
+    let strSpaces = " ".repeat(spaces);
+    let strDots = "*".repeat(dots);
+    return `${strSpaces}${strDots}\n`;
+  };  
+  let str = "";
+  let n = 0;
+  // Parte de arriba del diamante
+  while (n < size) {
+    if (n % 2 != 0) {
+      str += printLn(size, n);
+    }
+    ++n;
+  }
+  //parte de abajo del diamante
+  n = size;
+  while (n > 0) {
+    if (n % 2 != 0) {
+      str += printLn(size, n);
+    }
+    --n;
+  }
+  return str;
 }
 
 module.exports = { diamond };