diff --git a/src/main/scala/org/xcit/nback/markov/models/NBackSequence b/src/main/scala/org/xcit/nback/markov/models/NBackSequence
deleted file mode 100644
index c79a786..0000000
--- a/src/main/scala/org/xcit/nback/markov/models/NBackSequence
+++ /dev/null
@@ -1,6 +0,0 @@
-package org.xcit.nback.markov.models
-
-class NBackSequence(
-                     N: Int,
-                     length: String,
-                   ) {}

diff --git a/src/main/scala/org/xcit/nback/markov/models/NBackSequence b/src/main/scala/org/xcit/nback/markov/models/NBackSequence
deleted file mode 100644
index c79a786..0000000
--- a/src/main/scala/org/xcit/nback/markov/models/NBackSequence
+++ /dev/null
@@ -1,6 +0,0 @@
-package org.xcit.nback.markov.models
-
-class NBackSequence(
-                     N: Int,
-                     length: String,
-                   ) {}
diff --git a/src/main/scala/org/xcit/nback/markov/models/SequenceGenerator.scala b/src/main/scala/org/xcit/nback/markov/models/SequenceGenerator.scala
new file mode 100644
index 0000000..9bb098b
--- /dev/null
+++ b/src/main/scala/org/xcit/nback/markov/models/SequenceGenerator.scala
@@ -0,0 +1,17 @@
+package org.xcit.nback.markov.models
+
+import scala.util.Random
+
+class SequenceGenerator(
+                     length: Int, // sequence length
+                     offline: Boolean = true
+                   ) {
+
+  /**
+    * Generate simple alphanumeric string of size N
+    * @return string of size "length" with random alphanumeric characters.
+    */
+  def generate(): String = {
+    Random.alphanumeric.take(length).mkString
+  }
+}