diff --git a/.vscode/settings.json b/.vscode/settings.json
index 506fdf7..0effd91 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,5 @@
 {
     "ponicode.testSettings.testLocation.locationType": "Same folder as source file",
-    "ponicode.testSettings.testLocation.path": "{rootDir}/{filePath}/{fileName}.test.{ext}"
+    "ponicode.testSettings.testLocation.path": "{rootDir}/{filePath}/{fileName}.test.{ext}",
+    "python.pythonPath": ".venv/bin/python3.9"
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index cce2048..857a1f0 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,9 @@
-# data-structures-and-algorithms-python
\ No newline at end of file
+# data-structures-and-algorithms-python
+# Challenge Summary
+IT was eady
+## Challenge Description
+I did a tests to a shift array
+## Approach & Efficiency
+TDD
+## Solution
+![Getting Started](dddddddddddd.png)
\ No newline at end of file
diff --git a/data_structures_and_algorithms/__pycache__/__init__.cpython-38.pyc b/data_structures_and_algorithms/__pycache__/__init__.cpython-38.pyc
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diff --git a/data_structures_and_algorithms/challenges/array_reverse/__pycache__/array_shift.cpython-38.pyc b/data_structures_and_algorithms/challenges/array_reverse/__pycache__/array_shift.cpython-38.pyc
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diff --git a/data_structures_and_algorithms/challenges/array_reverse/array_reverse.py b/data_structures_and_algorithms/challenges/array_reverse/array_reverse.py
deleted file mode 100644
index 2d95a3f..0000000
--- a/data_structures_and_algorithms/challenges/array_reverse/array_reverse.py
+++ /dev/null
@@ -1,8 +0,0 @@
-def reverse_array(arr):
-
-      arr = arr[::-1]
-
-      return arr
-
-
-  print(arr)
diff --git a/data_structures_and_algorithms/challenges/array_reverse/array_shift.py b/data_structures_and_algorithms/challenges/array_reverse/array_shift.py
new file mode 100644
index 0000000..0b06801
--- /dev/null
+++ b/data_structures_and_algorithms/challenges/array_reverse/array_shift.py
@@ -0,0 +1,8 @@
+def array_shift(l,b):
+  middle = len(l) // 2
+  if len(l) % 2 == 0:
+
+    return l[:middle] + [b] + l[middle:]
+  else:
+    return l[:middle + 1] + [b] + l[middle +1:]
+
diff --git a/data_structures_and_algorithms/challenges/array_reverse/lab01.png b/data_structures_and_algorithms/challenges/array_reverse/lab01.png
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index 6404a5d..0000000
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diff --git a/data_structures_and_algorithms/data_structures/linked_list/__pycache__/linked_list.cpython-38.pyc b/data_structures_and_algorithms/data_structures/linked_list/__pycache__/linked_list.cpython-38.pyc
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diff --git a/tests/__pycache__/test_data_structures_and_algorithms.cpython-38-pytest-6.1.2.pyc b/tests/__pycache__/test_data_structures_and_algorithms.cpython-38-pytest-6.1.2.pyc
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diff --git a/tests/challenges/__pycache__/test_array_shift.cpython-38-pytest-6.1.2.pyc b/tests/challenges/__pycache__/test_array_shift.cpython-38-pytest-6.1.2.pyc
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diff --git a/tests/challenges/test_array_reverse.py b/tests/challenges/test_array_reverse.py
deleted file mode 100644
index 3eb0054..0000000
--- a/tests/challenges/test_array_reverse.py
+++ /dev/null
@@ -1,10 +0,0 @@
-# put your array_reverse challenge tests here
-from data_structures_and_algorithms.challenges.array_reverse.array_reverse import (
-    reverse_array,
-)
-
-# here's a test to get you started
-def test_leave_as_is():
-    actual = reverse_array([1])
-    expected = [1]
-    assert actual == expected
diff --git a/tests/challenges/test_array_shift.py b/tests/challenges/test_array_shift.py
new file mode 100644
index 0000000..fdd2d32
--- /dev/null
+++ b/tests/challenges/test_array_shift.py
@@ -0,0 +1,49 @@
+# put your array_reverse challenge tests here
+from data_structures_and_algorithms.challenges.array_reverse.array_shift import array_shift
+
+
+# "Happy Path" cases
+# test should pass for array with number of even element where elements are integers
+def test_one():
+  expected = [1,2,5,3,4]
+  actual = array_shift([1,2,3,4],5)
+  assert actual == expected
+
+# test should pass for array with number of even element where elements are letters
+def test_two():
+  expected = ['a','b','z','c','d']
+  actual = array_shift(['a','b','c','d'],'z')                  
+  assert actual == expected
+
+# test should pass for array with odd number of elements where elements are letters and integers
+def test_three():
+  expected = [1,2,3,'a',4,5]
+  actual = array_shift([1,2,3,4,5],'a')
+  assert actual == expected
+
+
+
+# Edge Case
+# test should pass for initial array with only 2 elements
+def test_four():
+  expected = [1,2,1]
+  actual = array_shift([1,1],2)
+  assert actual == expected
+
+
+
+# Expected Failure
+# test should pass for initial array with elements ptinted with spaces
+def test_five():
+  expected = [1,2,9,3]
+  actual = array_shift([ 1 ,  2 , 3 ],9)
+  assert actual == expected
+
+# test should pass for initial array with only one element
+def test_six():
+  expected = [1,2]
+  actual = array_shift([1],2)
+  assert actual == expected
+
+
+
diff --git a/tests/data_structures/__pycache__/test_linked_list.cpython-38-pytest-6.1.2.pyc b/tests/data_structures/__pycache__/test_linked_list.cpython-38-pytest-6.1.2.pyc
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