1 files changed, 39 insertions, 0 deletions
diff --git a/src/fldeff_poison.c b/src/fldeff_poison.c
new file mode 100644
index 000000000..98f54b4d4
--- /dev/null
+++ b/src/fldeff_poison.c
@@ -0,0 +1,39 @@
+#include "global.h"
+#include "task.h"
+#include "bg.h"
+#include "sound.h"
+#include "constants/songs.h"
+
+static void Task_FieldPoisonEffect(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+
+    switch (data[0])
+    {
+    case 0:
+        data[1] += 1;
+        if (data[1] > 4)
+            data[0]++;
+        break;
+    case 1:
+        data[1] -= 1;
+        if (data[1] == 0)
+            data[0]++;
+        break;
+    case 2:
+        DestroyTask(taskId);
+        return;
+    }
+    AdjustBgMosaic((u8)(((u8)data[1] << 4) | (u8)data[1]), BG_MOSAIC_SET);
+}
+
+void FldEffPoison_Start(void)
+{
+    PlaySE(SE_DAUGI);
+    CreateTask(Task_FieldPoisonEffect, 80);
+}
+
+bool32 FldEffPoison_IsActive(void)
+{
+    return FuncIsActiveTask(Task_FieldPoisonEffect);
+}