diff --git a/src/functional.ts b/src/functional.ts
new file mode 100644
index 0000000..05c4e57
--- /dev/null
+++ b/src/functional.ts
@@ -0,0 +1,8 @@
+export const sequence = <T, U>(fn: ($: T) => Promise<U>) => async (L: T[]) => {
+    for (const o of L)
+        await fn(o);
+};
+
+export const parallel = <T, U>(fn: ($: T) => Promise<U>) => async (L: T[]) => {
+    await Promise.all(L.map(fn));
+};