Set the cloud provider and request updates to the cloud var when updating the variable through blocks.

src/blocks/scratch3_data.js

@@ -45,6 +45,10 @@ class Scratch3DataBlocks {
         const variable = util.target.lookupOrCreateVariable(
             args.VARIABLE.id, args.VARIABLE.name);
         variable.value = args.VALUE;
+
+        if (variable.isCloud) {
+            util.ioQuery('cloud', 'requestUpdateVariable', [variable.name, args.VALUE]);
+        }
     }
 
     changeVariableBy (args, util) {
@@ -52,7 +56,12 @@ class Scratch3DataBlocks {
             args.VARIABLE.id, args.VARIABLE.name);
         const castedValue = Cast.toNumber(variable.value);
         const dValue = Cast.toNumber(args.VALUE);
-        variable.value = castedValue + dValue;
+        const newValue = castedValue + dValue;
+        variable.value = newValue;
+
+        if (variable.isCloud) {
+            util.ioQuery('cloud', 'requestUpdateVariable', [variable.name, newValue]);
+        }
     }
 
     changeMonitorVisibility (id, visible) {

src/virtual-machine.js

@@ -218,6 +218,10 @@ class VirtualMachine extends EventEmitter {
         this.runtime.ioDevices.video.setProvider(videoProvider);
     }
 
+    setCloudProvider (cloudProvider) {
+        this.runtime.ioDevices.cloud.setProvider(cloudProvider);
+    }
+
     /**
      * Tell the specified extension to scan for a peripheral.
      * @param {string} extensionId - the id of the extension.
@@ -463,6 +467,7 @@ class VirtualMachine extends EventEmitter {
             this.emitTargetsUpdate();
             this.emitWorkspaceUpdate();
             this.runtime.setEditingTarget(this.editingTarget);
+            this.runtime.ioDevices.cloud.setStage(this.runtime.getTargetForStage());
         });
     }