diff --git a/sistema.ts b/sistema.ts
new file mode 100644
index 0000000..ffb51c6
--- /dev/null
+++ b/sistema.ts
@@ -0,0 +1,22 @@
+const menuPrincipal = `
+Sistema de Series
+
+1.  adicionar
+2.  remover
+3.  atualizar
+4.  ler
+5.  sair
+
+entre com uma opção: `
+
+function principal(){
+    let op: number;
+    op = parseInt(prompt(menuPrincipal));
+    while (op!=5){
+        op = parseInt(prompt(menuPrincipal));
+        
+        }
+    }
+principal()
+
+