diff --git a/callback task/index.html b/callback task/index.html
new file mode 100644
index 0000000..7c87995
--- /dev/null
+++ b/callback task/index.html	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    
+    <script src="main.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/callback task/main.js b/callback task/main.js
new file mode 100644
index 0000000..aad190a
--- /dev/null
+++ b/callback task/main.js	
@@ -0,0 +1,95 @@
+// ********************filter**************************//
+function filtration(arr) {
+  let result = [];
+
+  for (let i = 0; i < arr.length; i++) {
+    if (arr[i] >= 0) {
+      result.push(arr[i]);
+    }
+  }
+ console.log(result)
+}
+filtration([1, 2, 3, 4, 5, 6,-7])
+
+
+// ********************map**************************//
+function mapping(arr){
+  let result2=[];
+  for(let i=0;i<arr.length;i++){
+    result2.push(arr[i]*10)
+  }
+  console.log(result2)
+}
+
+mapping([1, 2, 3, 4, 5, 6,-7])
+
+// ********************some**************************//
+
+let animalsId=[1,2,3,4,5,6]
+
+let animalResult=animalsId.some(checkAnimalId);
+console.log(animalResult)
+
+function checkAnimalId(animal){
+  if(animal<7){
+    return true;
+  }
+}
+
+//  second phase of some--------------//
+                                           
+function something(arr){
+  arr.forEach(element => {
+    if(element>=0){
+      console.log("true")
+    }else{
+      console.log(`${element} is false`)
+    }
+  });
+}
+
+
+// ********************every**************************//
+
+let blocks=[1,2,3,4,5,6,66]
+
+let blockResult=blocks.every(checkBlock);
+console.log(blockResult)
+
+function checkBlock(block){
+  if(block<=12){
+    return true;
+  }
+}
+
+
+// ********************reverse**************************//
+let digits=[1,2,3,4,5,6];
+
+function reversed(arr){
+  let temp=[];
+  for(let i=arr.length-1;i>=0;i--){
+temp.push(arr[i]);
+  }
+  return temp;
+}
+let resultReversed=reversed(digits);
+console.log(resultReversed);
+
+
+
+// ********************concatination**************************//
+
+function concatination(...rest){
+  let temp=[];
+  let num=[];
+  temp=rest.join();
+  for(let i=0;i<temp.length;i++){
+    if(temp[i] !==','){
+      num.push(+ temp[i]);
+    }
+  }
+  return num;
+}
+let resultConcatination=concatination([1,2,3,4,5,6],[1,2,3,4,5,6])
+console.log(resultConcatination);
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