diff --git a/src/cron/daemon/build.v b/src/cron/daemon/build.v
new file mode 100644
index 0000000..e7e5ac3
--- /dev/null
+++ b/src/cron/daemon/build.v
@@ -0,0 +1,45 @@
+module daemon
+
+import git
+import time
+import sync.stdatomic
+
+// update_builds starts as many builds as possible.
+fn (mut d Daemon) update_builds() ? {
+	now := time.now()
+
+	for d.queue.len() > 0 {
+		if d.queue.peek() ?.timestamp < now {
+			sb := d.queue.pop() ?
+
+			// If this build couldn't be scheduled, no more will be possible.
+			if !d.start_build(sb.repo_id)? {
+				break
+			}
+		} else {
+			break
+		}
+	}
+}
+
+// start_build starts a build for the given repo_id.
+fn (mut d Daemon) start_build(repo_id string) ?bool {
+	for i in 0..d.atomics.len {
+		if stdatomic.load_u64(&d.atomics[i]) == 0 {
+			stdatomic.store_u64(&d.atomics[i], 1)
+
+			go d.run_build(i, d.repos_map[repo_id])
+
+			return true
+		}
+	}
+
+	return false
+}
+
+fn (mut d Daemon) run_build(build_index int, repo git.GitRepo) ? {
+	time.sleep(10 * time.second)
+
+	stdatomic.store_u64(&d.atomics[build_index], 2)
+}
+
diff --git a/src/cron/daemon/daemon.v b/src/cron/daemon/daemon.v
index eadd04c..fc917e4 100644
--- a/src/cron/daemon/daemon.v
+++ b/src/cron/daemon/daemon.v
@@ -61,8 +61,13 @@ pub fn init_daemon(logger log.Log, address string, api_key string, base_image st
 // run starts the actual daemon process. It runs builds when possible &
 // periodically refreshes the list of repositories to ensure we stay in sync.
 pub fn (mut d Daemon) run() ? {
-	println(d.queue)
-	println('i am running')
+	for {
+		d.update_builds() ?
+		println(d.queue)
+		println(d.atomics)
+
+		time.sleep(60 * time.second)
+	}
 }
 
 fn (mut d Daemon) renew_repos() ? {
diff --git a/vieter.toml b/vieter.toml
index e646739..452500f 100644
--- a/vieter.toml
+++ b/vieter.toml
@@ -9,5 +9,5 @@ default_arch = "x86_64"
 
 address = "http://localhost:8000"
 
-global_schedule = '0 3'
+global_schedule = '* *'